Geometryhard · Past Paper
In triangle ABC, if sin^2 A + sin^2 B = sin^2 C, then the triangle is:
AEquilateral
BIsosceles
CRight-angled
DObtuse
✓ Correct Answer: C — Right-angled
By Sine rule, a/sin A = b/sin B = c/sin C = 2R. So a^2 + b^2 = c^2, which defines a right triangle.
Share this question
More from Geometry
- If an angle is 0 degrees, it is called a:
- If two angles are supplementary and one is 110 degrees, what is the other?
- If three angles on a straight line are x, 2x, and 3x, what is the value of x?
- Two supplementary angles are in the ratio 2:3. Find the smaller angle.
- Two lines are perpendicular if they intersect at an angle of: