Mathematics Geometryusually ages 12–14

Understanding angles (age 12+)

Use ruler and compasses to perform standard constructions: perpendicular bisector of a line segment, perpendicular to a line from or at a given point, and bisecting an angle

How to tell they’ve got it

Tick these off as you see them — no test required.

Construct the perpendicular bisector of a line segment using compasses and a straight edge
Construct an angle bisector and verify by measuring both halves
Construct a perpendicular from a point to a line using compasses only

🖨 Print this page to keep the checklist — it prints beautifully.

Try this together

If your child has only a ruler and a pair of compasses, can they construct a line that cuts another line segment exactly in half at a right angle — without using a protractor?

Where this sits on the map

Stuck here? Check the skills it builds on first. Confident? Here’s what it unlocks.

Builds on

Measuring angles (age 11+)ages 11–13Compass constructions require confident drawing and measuring skills first

Understanding angles (age 12+)this skill · ages 12–14

Unlocks

Nothing on the map depends on this yet.

solid = must come firstdashed = helps

Curriculum alignment

Candidate matches to official curriculum codes — machine-suggested, unreviewed (v0.1).

This skill sits beyond Year 6 in the Australian Curriculum, so no F–6 code is matched. It also sits beyond the NSW K–6 syllabuses. It also sits beyond Level 6 in the Victorian Curriculum.

Nearby on the map

Angles in triangles (age 12+)ages 12–14 Angles with parallel linesages 12–14 Circles: Circumference & Areaages 12–14 Coordinates (age 12+)ages 12–14

All Geometry skills →