Grade 8 Math · Spatial Sense

Angle properties with parallel lines

Solve for unknown angles using intersecting and parallel line properties. Unlimited questions, five difficulty levels, and a full worked solution every time — free.

Practice this skill Curriculum: G8-E2.2

Try one

Two straight lines cross. One of the angles formed measures 83 deg. Angle x is directly opposite it. Find x.

Answer: 83

See one solved, step by step

A line crosses two parallel lines. One angle measures 92 deg, and angle x is its co-interior partner between the parallel lines. Find x.

📘 Worked solution
1Co-interior angles between parallel lines add to 180°.The two angles sit between the parallel lines on the same side of the crossing line.
2x = 180 - 92 = 88°Apply the rule to the given angle.

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