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.