Geometrymedium · Past Paper
Two parallel lines are cut by a transversal. If one co-interior angle is (3x + 20) and the other is (2x + 10), find x.
A15
B30
C50
D70
✓ Correct Answer: B — 30
(3x + 20) + (2x + 10) = 180; 5x + 30 = 180; 5x = 150; x = 30.
Share this question
More from Geometry
- In a triangle ABC, if 2*angle A = 3*angle B = 6*angle C, find angle A.
- What is the sum of any two sides of a triangle compared to the third side?
- What is the length of the longest chord of a circle with radius 5.5 cm?
- If two circles touch each other internally, the distance between their centers is equal to:
- A bicycle wheel makes 5000 revolutions in moving 11 km. What is the diameter of the wheel?