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HomeQuestion 1FluencyCore
Original practice · Free Online RevisionSkill · parallel lines
Two parallel lines are cut by a transversal. An alternate angle is 73°. Find the matching alternate angle.
Geometry & MensurationCoreMaths revision
Angle Properties (Advanced)
Chain multiple angle facts in parallel-line and polygon arguments.
Focus points
✓Combine parallel-line angle facts.
✓Use polygon angle sums algebraically.
✓Write short geometric justifications.
Orin
The Wise Owl
Guides study flow, revision planning, and calmer focus sessions.
Practice setQuestion lineup
Try each question first, reveal a hint when you need one, then check the worked answer. Mark them done as you go — finish the set to claim your chips.
8 revision questions
Question 2FluencyCore
Original practice · Free Online RevisionSkill · co-interior equation
Co-interior angles are (3x+12)° and (5x−8)°. Find x.
Question 3FluencyCore
Original practice · Free Online RevisionSkill · regular polygons
A regular polygon has exterior angle 30°. Find its interior angle and number of sides.
Question 4FluencyCore
Original practice · Free Online RevisionSkill · quadrilateral angles
The angles of a quadrilateral are x, 2x, 3x and 4x. Find x.
Question 5FluencyCore
Original practice · Free Online RevisionSkill · exterior angle
An isosceles triangle has an exterior angle of 124° at a base vertex. Find all interior angles.
Question 6ReasoningCore
Original practice · Free Online RevisionSkill · geometric reasoning
Explain why the exterior angles of any convex polygon sum to 360°.
Question 7ApplicationCore
Original practice · Free Online RevisionSkill · parallel-line equation
A transversal crosses two lines. A pair of corresponding angles are 4x+7 and 6x−29. If the lines are parallel, find the angle.
Question 8ChallengeStretch
Original practice · Free Online RevisionSkill · polygon challenge
A regular polygon has interior angle 165°. Find the number of diagonals.