Geometrymedium · Past Paper
The angles of a triangle are in the ratio 1:2:3. What type of triangle is it?
AEquilateral
BIsosceles
CRight-angled
DObtuse-angled
✓ Correct Answer: C — Right-angled
x + 2x + 3x = 180; 6x = 180; x = 30. Angles are 30, 60, 90. One angle is 90, so it is right-angled.
Share this question
More from Geometry
- How many degrees does the minute hand of a clock turn in 20 minutes?
- What is the sum of two angles that form a linear pair?
- If the area of a triangle with vertices (0,0), (x,0), and (0,10) is 50, find x.
- What is the complement of a 0 degree angle?
- If the medians of a triangle are 3, 4, 5, what is the area of the triangle?