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131_G6U26_WB˜ ˙—» ¿º 2011.6.23 3:26 PM ˘ ` 10

131-B5-2

2. Use a ruler without any markings and a compass to construct an angle congruent
to AOB.

Example

A

OB A
AA

O BO BO B

a. A b. A B
OB O
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