Question

11. If one angle of a triangle is equal to the sum of the other two, show that
the triangle is right angled.​

Answer 1

Step-by-step explanation:

Let ABC be a triangle such that ∠A=∠B+∠C.

Then,

=> ∠A+∠B+∠C=180∘

∠A+∠B+∠C=180∘⇒∠A+∠A=180∘

∠A+∠B+∠C=180∘⇒∠A+∠A=180∘⇒∠A=90∘

Answer 2

Step-by-step explanation:

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