If two angles of a triangle are 21° and 38°, then the triangle is :
A. Right-angled triangle
B. Acute-angled triangle
C. Obtuse-angled triangle
D. Isosceles triangle
Answer: Option C
Solution (By Examveda Team)
According to question,
Given :
∠A = 21°, ∠C = 38°
As we know that
∠A + ∠B + ∠C
∠B = 180° - 21° - 38°
∠B = 121°
∴ The triangle is obtuse-angled triangle.
This Question Belongs to Arithmetic Ability >> Triangles
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