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Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

Chapter Review

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Exercise 6 Page 91

Translations are done by adding or subtracting values from the x-coordinate if the figure is being moved left or right, and from the y-coordinate if the figure is being moved up or down.

A'(-1, 4), B(2,1), C(0,0)

Practice makes perfect

We are given a triangle and asked to perform a translation.

polygon

Translations are done by adding or subtracting values from the x-coordinate if the figure is being moved left or right, and from the y-coordinate if the figure is being moved up or down. We want to draw the image of our figure after a translation of 4 units to the left and 1 unit down. So, we will subtract 4 from the x-coordinate and subtract 1 from the y-coordinate of each vertex.

Vertices of ABC	(x-4,y-1)	Vertices of A'B'C'
A(3,5)	(3 - 4,5 - 1)	A'(- 1,4)
B(6,2)	(6 - 4,2 - 1)	B'(2,1)
C(4,1)	(4 - 4,1 - 1)	C'(0,0)

Let's do the translation!

translation

Subchapter links

1 Translations p.91

2 Reflections p.92

3 Rotations p.92-93

4 Congruent Figures p.93

5 Dilations p.94

6 Similar Figures p.94-95

7 Perimeters and Areas of Similar Figures p.95