Geometry

Prathomsuksa 4

Can you guess the shape?

What shape am I?

I am a flat shape.

I have 1 curved side.I have no corners.

I’m a circle!

I am a flat shape.I have 3 straight sides.I have 3 corners.

What shape am I?

I’m a triangle!

I am a pentagon!

I am a flat shape.

I have 5 straight sides.

I have 5 corners.

What shape am I?

I’m a square!

What shape am I?

I am a flat shape.

I have 4 straight sides.

I have 4 corners.All my sides are the same length.

WELL DONE

Vocabulary

geometry

Vocabulary

shape

Vocabulary

dimensional

Vocabulary

breadth

Modifiers

ModifiersA modifier can be an adjective, an

adverb, or a phrase or clause acting as an adjective or adverb In every case, the basic principle is the same: the modifier adds information to another element in the sentence.

Adjective Modifier

Adjectives describe nouns by answering one of these three questions:

- What kind is it? - How many are there? - Which one is it?An adjective can be a single word and a phrase.

Example

• Logical structure

• Mathematical relationship

adjective

adjective

Right angle

Central point

Solid object

adjective

adjective

adjective

Geometry

Geometry is the study of angles and triangles, perimeter, area and volume. It differs from algebra in that one develops a logical structure where mathematical relationships are proved and applied.

Two- dimensional figure

Geometric shapes: 2 dimensional

A polygon (many sided plane figure) having five sides and five interior angles

pentagon

Geometric shapes: 2 dimensional

triangle

A three sided plane figure with 2 equal sides

Geometric shapes: 2 dimensional

square

A four- sided plane figure with four right angles, opposite sides parallel and each side of equal lenght

Geometric shapes: 2 dimensional

circle

A circle is a two-dimensional shape formed by all points that are one consistent distance or "radius"

from a single central point.

Three- dimensional figure

Geometric shapes: 3 dimensional

Cube

A cube is a solid object with 6 square sides of the same size. It has 6 equal, square faces which meet at right-

angles. It has 8 vertices and 12 edges.

Geometric shapes: 3 dimensional

A solid tube with long straight sides and two equal- sized circular ends.

Cylinder

Geometric shapes: 3 dimensional

A solid object with 6 rectangular sides. A closed box composed of three pairs of rectangular faced opposite each other and joined at right angles to each other.

Cuboid

Geometric shapes: 3 dimensional

A tetrahedron is a solid shape which has four vertices, six edges, and four equivalent equilateral triangular faces.

Tetrahedron

Wonderful Geometric

- Make a group of five people- Send one representative to draw a random

slot in the box- Read the direction and come to get the

geometric sharps in front of the class- Create the picture and name it- Come up with your idea and present by using

song and movement

Geometric shapes