Bellwork 1 A landscaper is to install edging

Bellwork 1) A landscaper is to install edging around the entire garden. The costs $1. 39 for each 24 in-long- a) What is the cost of the stripping to surround the entire garden? edging strip. needed 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 Reflections Rigor – 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 reflections 1. 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 Not on graph paper 1. Draw line of reflection 1. Use a ruler to draw segments from each vertex 2. Count horizontal/vertical and perpendicular to the line spaces from the vertex to of reflection the line of reflection 3. Count the same number of 2. Measure the distance from the vertex to the line of spaces on the other side of reflection the line of reflection and plot the image 3. Measure the same distance on the other side and plot the image.

Function Notation for Reflections

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 4, 6, 8 – 11, 19 #1, Part B: Reflections worksheet (resource page 1. 2. 1) For problem #52, after graphing the equations, reflect y = x 2 + 3 across y = x.

Honors: 9 -1 Classwork Part A: Core book pg 372 – 374 4, 6, 8 – 11, 19, 20 #1, Part B: Reflections worksheet (resource page 1. 2. 1) For problem #52, after graphing the equations, reflect y = x 2 + 3 across y = x.