Page 133 - NUMINO_WB_3A
P. 133
114_G3U06_WB_CA_˙—» ¿º 2011.4.5 3:49 PM ˘ ` 7 PDF_In 2540DPI 150LPI T

114-B4-1

Finding Right Angles
1. Find right angles and mark them with square corners, as shown in the

example below.

Example
   128   129   130   131   132   133   134   135   136   137   138