Last updated: October 22, 2026 · Written by the Math Made Easy math teachers
Looking for a parallel lines angles quiz? Then this Grade 8 quiz on Angle Relationships in Triangles and Parallel Lines asks 10 multiple-choice questions with instant feedback. Ten multiple-choice questions check triangle angle sums, exterior angles, and the angle pairs made by parallel lines. Sketch each situation, choose one answer, and read the explanation to see the slip behind each wrong option.
Standards: 8.G.A.5 · Level: Grade 8
What this Angle Relationships in Triangles and Parallel Lines quiz checks
- Interior angles of a triangle total 180°.
- An exterior angle equals the sum of the two remote interior angles.
- Parallel lines cut by a transversal make equal corresponding and alternate angles.
- Same-side interior angles are supplementary (sum 180°).
- Two triangles with two pairs of equal angles are similar (AA).
The 10 questions of the quiz
- Two angles of a triangle measure 82° and 49°. What is the third angle?
- The remote interior angles of a triangle are 35° and 78°. What is the exterior angle?
- Parallel lines are cut by a transversal. How are corresponding angles related?
- Which statement about same-side interior angles is true when two parallel lines are cut by a transversal?
- Lines ℓ and m are parallel. What is x?
- Lines ℓ and m are parallel. What is x?
- Which pair of angles must be equal when parallel lines are cut by a transversal?
- An isosceles triangle has a 50° vertex angle. What is each base angle?
- Two triangles each have angles of 40° and 75°. Which statement is true?
- Vertical angles measure (2x + 15)° and (3x − 5)°. What is each angle?
After the quiz
Missed a question? Reread the Angle Relationships in Triangles and Parallel Lines lesson, then take the quiz again. Next, solve the Grade 8 worksheet on Angle Relationships in Triangles and Parallel Lines, one star first, then two and three stars. Finally, take the chapter test under real conditions, without notes and with a timer.