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122_G4U5_WB˜ ˙—» ¿º 2011.3.30 2:56 PM ˘ ` 23 PDF_In 2540DPI 150LPI T
122-S1-1
1. Find the measure of angle a when a rectangular piece of paper is folded
as shown below. (The sum of the interior angles of a triangle is 180 .)
A D
30 aC
BE
122-S1-1
1. Find the measure of angle a when a rectangular piece of paper is folded
as shown below. (The sum of the interior angles of a triangle is 180 .)
A D
30 aC
BE
