Page 80 - SPARK OF MATH book 4
P. 80
(5-2) Measuring Angles.
To measure angles we need a tool called a ‘Protractor’.
Step 1. Place the center point of the protractor A
on the vertex of the angle.
Step 2. Place the 0 mark on one side of the angle.
Step 3. Read the measure of the angle where B
the other side crosses the protractor, start from 0. C
The measure of the angle is 70°.
Measure the degree of each angle.
Measure & Write whether the angles are acute or obtuse.
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