Mathematics for IGCSE & O level - Geometrical Constructions (Section 1 - No. 50)
What is the first step when you want to measure an angle with a protractor?
Measure the lengths of the sides
Estimate the angle.
Place the center of the protractor on the vertex.
Align the protractor with the arms
คำอธิบาย
The first step is to make an estimate of the angle.