Bellwork1) A landscaper is to install edging around the entire garden. The edging costs $1.39 for each 24in-long- strip.

a) What is the cost of the stripping needed to surround the entire garden?

b) What is the area of the garden to the nearest tenth of a foot?

2) Tear out Chapter 9 from the core book: pgs 365 – 413, EXCEPT pg 405 -408 on dilations

9-1 ReflectionsRigor – Students will correctly reflect images over a given line of reflection and understand the definition of a reflection

Relevance – Reflections describe rigid motion

Exlploration activity into reflections1. Turn in your core book to pg 369 example 1 and

follow the instructions in the bullets to reflect the triangle and quadrilateral. Use scratch paper instead of tracing paper.

2. Draw a segment connecting corresponding vertices of the pre-image and image.

3. Measure the distance along that segment from each vertex to the line of reflection in centimeters. What do you notice?

Reflection defined A reflection is a rigid transformation so that

the line of reflection is a perpendicular bisector for the segments connecting each pre-image point to its corresponding image.

Reflection Methods:On graph paper

1. Draw line of reflection

2. Count horizontal/vertical spaces from the vertex to the line of reflection

3. Count the same number of spaces on the other side of the line of reflection and plot the image

Not on graph paper

1. Use a ruler to draw segments from each vertex and perpendicular to the line of reflection

2. Measure the distance from the vertex to the line of reflection

3. Measure the same distance on the other side and plot the image.

Function Notation for Reflections

“Reflect triangle ABC across the line y = 4” would be written as

Highlight the reflection rules for the coordinate plane on core book pg371

Examples to put into notes

Core book pg 370 – 371 examples 2 and 3

Standard: 9-1 Classwork

Part A: Core book pg 372 – 374 #1, 4, 6, 8 – 11, 19

Part B: Reflections worksheet (resource page 1.2.1) For problem #52, after graphing the

equations, reflect y = x2 + 3 across y = x.

Honors: 9-1 Classwork

Part A: Core book pg 372 – 374 #1, 4, 6, 8 – 11, 19, 20

Part B: Reflections worksheet (resource page 1.2.1) For problem #52, after graphing the

equations, reflect y = x2 + 3 across y = x.