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

Recall / Warm-Up

Review the difference between constructing and measuring before bisecting anything.

To copy a segment $AB$ with a pair of compasses, what do you do first?

Draw a fresh line first, then guess a matching length by eye

Set the compass point on $A$ and the pencil on $B$ , to capture the length

Measure $AB$ with a ruler first, then set the compass to that ruler reading