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124_G6U25_WB_˙—» ¿º 2011.6.23 3:32 PM ˘ ` 19

124-P3-1

Folded Shapes and Angles

A rectangular piece of tape is folded. Find the unknown angle, a.

a
35

Step 1. Angle b is made when the piece of tape is folded. Find m b.

a
b

35

Step 2. Find m a.
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