Exercises: Constructing and Bisecting Line Segments and Angles

Use only a pair of compasses and a straight edge to construct — a protractor may only be used to check your work afterward.

Grade 7·15 problems·~24 min·Uganda NCDC Primary 7 Mathematics·lesson·construction-02

Work through problems with immediate feedback

Fluency Practice

$An 80-degree angle at vertex O with a single arc from the vertex crossing both arms at points P and Q$

To bisect an $80\degree$ angle at vertex $O$ , where do you strike the FIRST arc from?

From vertex $O$ , cutting both arms of the angle

From the two points where the angle's arms end, at their far tips

From the midpoint of the angle's two arms, one arc for each