4th geometry unit 2_using a protractor

1. USING A
PROTRACTOR
By Maria Adrover
Geometry 4th_Unit 2_Angles

2. MEASURING ANGLES
Set the protractor so that:
The vertex of the angle match the protractor centre.
One angle arm should match the base line.
Read the score, this is the angle measure.

3. TIP!!
If the arms of the angles are too short...
- Make them longer using a ruler and a pencil.
- Now you can measure it!!

4. DRAWING ANGLES
Draw a straight line (using a ruler) starting from an A point.
Match the protractor centre with the A point
Look for the measure (angle degrees) in the protractor score
and mark it as point B.
Draw a straight line matching the two points (A--B)