Geometrymedium · Past Paper
An angle is 10 degrees less than its supplement. What is the angle?
A85 degrees
B95 degrees
C80 degrees
D100 degrees
✓ Correct Answer: A — 85 degrees
x = (180 - x) - 10; 2x = 170; x = 85.
Share this question
More from Geometry
- If the angle between two tangents drawn from an external point P to a circle is 120 degrees and the radius is 10 cm, find the distance of the point P from the center.
- What is the reflex angle of 120 degrees?
- If three angles on a straight line are x, 2x, and 3x, what is the value of x?
- If the angle between two tangents from P to a circle is 90 degrees and the radius is 5 cm, what is the length of each tangent?
- Two parallel lines are cut by a transversal. If one co-interior angle is (3x + 20) and the other is (2x + 10), find x.