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Number of Right Angles
Find the total number of right angles in the shape below.

Step 1. One of the right angles is shown in the
figure on the right. Find 3 more right
angles like the one shown.

Step 2. One of the right angles is shown in the
figure on the right. Find 3 more right
angles like the one shown.

Step 3. How many right angles are there in the shape?
   138   139   140   141   142   143   144   145   146   147   148