Last updated: October 22, 2026 · Written by the Math Made Easy math teachers

Standards: G-CO.C.9 · Level: Grade 10 Geometry
Question 1 Name the pairs (2 points)
Lines a and b are cut by a transversal and the angles are numbered as shown.
- Name the relationship of ∠4 and ∠5. (1 point)
- Name the relationship of ∠1 and ∠8. (1 point)
Question 2 Find three angles (3 points)
Lines a and b are parallel and m∠2 = 61°.
- Find m∠6. (1 point)
- Find m∠4. (1 point)
- Find m∠7. (1 point)
Question 3 Alternate interior equation (2 points)
Lines a and b are parallel. Alternate interior angles measure (4x + 11)° and (6x − 19)°. Find x and the measure of each angle.
Question 4 Decide if lines are parallel (3 points)
A transversal crosses two lines. State whether the lines must be parallel and give a reason.
- Corresponding angles measure 76° and 76°. (1 point)
- Alternate interior angles measure 64° and 66°. (1 point)
- Same-side interior angles measure 105° and 75°. (1 point)
Question 5 Parallel with same-side angles (2 points)
Same-side interior angles formed by a transversal measure (7x + 4)° and (5x + 20)°. Find x so that the two lines are parallel, then find both angle measures.
Question 6 Prove lines parallel (3 points)
Given: ∠2 ≅ ∠7. Prove: a ∥ b. Use the numbering in the figure and complete a two-column proof.
Question 7 Equidistant point (3 points)
Point P is on the perpendicular bisector of AB, where AB = 48. PA = (2x + 9) and PB = (4x − 7).
- Find x. (1 point)
- Find PA. (1 point)
- Find the distance from P to the midpoint of AB. (1 point)
Question 8 Crossing bike lanes (2 points)
Two bike lanes run parallel. A crosswalk crosses both. On the first lane, the angle between the crosswalk and the lane is 38° on the east side. Find the matching angle on the second lane and the same-side interior angle that is its neighbor.
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