Question
If two angles of a triangle are 21° and 38°, then the triangle is :
Answer: Option C
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.
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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.
Was this answer helpful ?
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