Geometrymedium · Past Paper
In triangle ABC, if AB=AC and angle B=50, find angle A.
A50 degrees
B80 degrees
C100 degrees
D40 degrees
✓ Correct Answer: B — 80 degrees
If AB=AC, then angle C = angle B = 50. Angle A = 180 - (50+50) = 80 degrees.
Share this question
More from Geometry
- What is the slope of the line perpendicular to the line x - 2y + 3 = 0?
- A triangle has angles measuring 30, 60, and 90 degrees. What type of triangle is it?
- If the slope of a line is 0, the line is parallel to which axis?
- What is the relationship between the central angle and the inscribed angle standing on the same arc?
- If a chord of length 8 cm is at a distance of 3 cm from the center, what is the radius?