Activities & Games
Four interactive activities that turn the two rules of this lesson into practice. Everything runs instantly in the browser — no sign in required.
Game 1
Find x — unlimited generator
Two straight lines intersect. Use the vertically opposite angles rule to find x. A new figure is generated every round.
3x + 23 = 35
Score: 0 / 0
Game 2
The 360° balance challenge
Drag the slider until the missing angle closes the full turn around the point. Perfect closing = 360°.
Your angle: 90°
Game 3
True or false rapid round
Eight statements about angle relationships. Decide quickly — no figures, just the rules.
Statement 1 of 8 · Score 0
Vertically opposite angles always have the same measure.
Game 4
Match the term to its definition
Select a term on the left, then click the definition that belongs to it.
Matched: 0 / 5
Classroom activity
Off-screen tasks for pairs
Three quick tasks that need only a ruler, a protractor and paper.
- The scissors investigation. Open a pair of scissors, measure the two angles between the blades and record them. Repeat five times. What stays true about the two opposite angles?
- Design a crossroads. Draw two roads crossing at one point. Label one angle only, then challenge a partner to label all four angles and justify each with a rule.
- Pizza 360. Draw a circle and cut it into four sectors from the centre. Measure three sectors and predict the fourth before measuring it. Compare the prediction with the measurement.