- A70°, 70°, 40°
- B60°, 70°, 50°
- C90°, 50°, 50°
- D100°, 100°, 20°
Step-by-Step Solution
70+70+40 = 180 and two angles are equal, so it is a valid isosceles triangle. The others either are scalene or exceed 180.
Answer: A) 70°, 70°, 40°
Which of the following can be the three angles of an isosceles triangle?
Class 9Properties of Isosceles TrianglesGeometry — Triangles
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