think of as many different shapes that have angles. write

30.03.20XXX.III.MMXXLO: I can identify acute angles

Starter:

Think of as many different shapes that have angles. Write them down on your whiteboards.

You have 1 minute, go!

Q. What are angles?


• Angles are the measurements of the space between two lines that join together.

Angles are found in lots of different things, including many different everyday objects.

Right angles are a common angle found in everyday items. But there are other types of angles out there as well.


Angles are found in everyday life. There are many jobs that require knowledge of angles, such as engineering and architecture. Even athletes use angles, in order to make their performance better. Therefore, the importance of being able to recognise different angles and have a secure knowledge of them is important for future jobs.


Today, we are going to be looking acute angles.

Acute angles are angles that are smaller than 90 degrees.

This means they are smaller than a right angle.

Q. What does a right-angle look like?

This is a right angle because it measures at 90 degrees. All right angles measure at 90 degrees exactly.


This shows us the angle. We measure this in degrees using a protractor.

This is a right angle because it measures at 90 degrees.

Key Questions:

What is an angle?What do we measure an angle in?What does acute mean?What does obtuse mean?

Key Vocab:

Angle, degrees, acute, obtuse, shape,

This is a acute angle because the angle shows us a smaller angle than 90 degrees.


Have a look around your house. See if you can spot any acute angles.

These are both objects that have acute angles because they are smaller than a right angle and smaller than 90 degrees.


Q. Do we think this is an acute angle?

This is an acute angle because the angle measures to less that 90 degrees.

Q. Why?

You can tell this is acute because it is smaller than a right angle.

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Key Vocab:

Angle, degrees, acute, obtuse, shape


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On your whiteboards, write down whether you think the angles shown are acute or not:


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On your whiteboards, write down whether you think the angles shown are acute or not:

Acute

Not acute

Acute


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Do it:

Circle the following shapes that have acute angles.


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Secure it:

Explain your answer using your sentence starters.


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Deepen it:

30.03.20XXX.III.MMXXFluency LO: I can practise column addition

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Copy out and complete these column addition problems:

Copy out and complete the following questions.

31.03.20XXXI.III.MMXXLO: I can identify obtuse angles

Starter:

Q. If we know that an acute angle is smaller than 90 degrees, what do we think an obtuse angle is?

Write down on your whiteboards what you think an obtuse angle is.


Angles are found in everyday life. There are many jobs that require knowledge of angles, such as engineering and architecture. Even athletes use angles, in order to make their performance better. Therefore, the importance of being able to recognise different angles and have a secure knowledge of them is important for future jobs.


Today, we are going to be looking at obtuse angles.

Obtuse angles are angles that are bigger than 90 degrees but smaller than 180 degrees.

Q. What does a 90 degree angle, or a right angle look like?

Q. What do you think a 180 degree angle looks like?

A straight line is also a 180-degree angle.


Q. How do we know that this is an obtuse angle?

We know that this is an obtuse angle because it is greater than 90 degrees, but smaller than 180 degrees.

This is a right angle because the angle is measured at 90 degrees.

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Q. Do you think this is an obtuse angle?

I know that this….. because….

I know that this is an obtuse angle because the angle shown is greater than a right angle or 90 degrees but less than a straight line or 180 degrees.


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On your whiteboards, write down whether you think these angles are obtuse or not:

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On your whiteboards, write down whether you think these angles are obtuse or not:

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Obtuse

Obtuse

Not obtuse


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Do it:


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Secure it

Explain your answer using our sentence starters.


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Deepen it

31.03.20XXXI.III.MMXXFluency LO: I can practise column multiplication

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01.04.20I.IV.MMXXLO: I can identify acute angles in a shape

Starter:

Look at this building. Can you spot any acute or obtuse angles within this building?

Write down how many acute and obtuse angles you can see.


Today, we are going to be looking for different acute angles within a range of shapes.

Q. What are acute angles?

Acute angles are angles that are smaller than a right-angle. A right angle is 90 degrees. So an acute angle must be measured at less than 90 degrees.

Q. What are shapes?

A shape is a form of an object or outline.

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Key Vocab:



This shows us the angle. We measure this in degrees using a protractor.

This is a right angle because it measures at 90 degrees.

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Key Vocab:

Angle, degrees, acute, obtuse, shape,

This is a acute angle because the angle shows us a smaller angle than 90 degrees.


Have a look at this shape.

Q. Can you spot any acute angles within the shape?

Q. How many acute angles can you see?

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There are three acute angles in this triangle. This means that each angle is going to measure between 1 degrees and 90 degrees.

Each point where two lines meet is considered an angle.

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Q. Are there any other types of angles in this shape?

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There are only two acute angles in this shape. This means that there are two angles that measure less than 90 degrees and less than a right angle.

Q. What might the other angles be?

The other angles in the shape are obtuse angles because they are bigger than a right angle

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On your whiteboards, copy the shape and write down how many angles you see. Then write down how many acute angles you can see.

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On your whiteboards, copy the shape and write down how many angles you see. Then write down how many acute angles you can see.

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There are 2 acute angles as they are smaller than a right angle.

This shape has 2 acute angles. The other angles are slightly biggerthan a right angle and so are obtuse.

This shape has 2 acute angles.It also has 2 obtuse angles and 1 right angle.


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Do it:

For each shape, write down how many angles you see, and the number of acute angles within each shape.


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Secure it:

Explain your answer using our sentence starters.


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Deepen it:

Reminder: A quadrilateral is a shape with 4 straight sides and is 2 dimensional.

01.04.20I.IV.MMXXFluency LO: I can practise my times tables

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02.04.20II.IV.MMXXLO: I can identify obtuse angles in shapes

Starter:

Q. How many obtuse angles can you spot within this windmill?

Q. Can you think of any other things that will have obtuse angles? Look around the room to help you.

Write your answers down on your whiteboards.


Starter:There are three obtuse angles in this windmill.

Here are some places youmight find obtuse angles.


Today, we are going to be looking for obtuse angles within shapes.

Q. What are obtuse angles?

Obtuse angles are angles that are greater than a right angle (90 degrees) but smaller than a straight line (180 degrees).

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Q. How do we know that this is an obtuse angle?

We know that this is an obtuse angle because it is greater than 90 degrees, but smaller than 180 degrees.


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Q. Can you spot any obtuse angles in this shape?

Q. How do you know?


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There are 2 obtuse angles in this shape. I know this because two angles are greater than a right angle.


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Q. How do you know?


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Q. Are there any other angles in this shape?

There are two obtuse angles in this shape. There are also two acute angles.

Obtuse angles


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On your whiteboards, draw this Venn diagram and write down the letter for where you think each shape would go.


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On your whiteboards, draw this Venn diagram and write down the letter for where you think each shape would go.

D BC

A


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Do it:


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Secure it:

Coco thinks that this hexagon has only 1 obtuse angle. Is she correct? Explain your answer using our sentence starters.


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Deepen it:

02.04.20II.IV.MMXXFluency LO: I can solve division questions using the bus stop method for division


03.04.20III.IV.MMXXLO: I can compare angles in size

Starter:

You have 1 minute to go around the room and write down as many different objects as you can with angles.

How many objects can you find with acute angles?

How many objects can you find with obtuse angles?

How many objects can you find with right angles?


We are going to be looking at comparing angles in size.

Q. What does ‘compare’ mean?

Compare means to estimate, measure or take note of the similarities or differences between two or more objects.

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Key Vocab:

Angle, degrees, acute, obtuse, shape, compare


This means today, we are going to be comparing two or more angles in size, being able to recognise which angle is bigger or smaller.

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Remember, this tells usthe angle and we measure thisin degrees.

Therefore, we use this to helpus decide which is angle is bigger.


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Q. Which angle is bigger?

Q. How do you know?

A. B.


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I know that angle A is bigger because the angle A is an obtuseangle, as it is bigger than a right angle. Angle B is acute, meaning it is smaller than a right angle and smaller than 90 degrees.

A. B.


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Q. Which angle is bigger?

Q. How do you know?

A.

B.


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B.

I know that angle B is bigger because angle A is an acute angle as it is smaller than a right angle.

Angle B is a right angle, and so would measure more than an acute angle, meaning angle B is bigger.

A.


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Do it:


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Secure it:

Explain your answer using our sentence starters below.


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Deepen it:

think of as many different shapes that have angles. write

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