Geometrymedium · Past Paper
In a cyclic quadrilateral ABCD, if angle A - angle C = 60 degrees, find angle A.
A60 degrees
B120 degrees
C150 degrees
D180 degrees
✓ Correct Answer: B — 120 degrees
A + C = 180 and A - C = 60. Adding both: 2A = 240 => A = 120 degrees.
Share this question
More from Geometry
- If the length of a chord of a circle of radius 10 cm is 16 cm, find its distance from the center.
- Find the equation of the line passing through the origin and the point (2, 4).
- What is the ratio of circumference to diameter of any circle?
- In a triangle, if the square of one side is equal to the sum of the squares of the other two sides, then the angle opposite the first side is:
- Find the slope of a line which makes an angle of 45 degrees with the positive direction of the x-axis.