Question

Can you prove that the angel of a triangle is equal to 180⁰

NOTE- Spam nhi krna ❌ koi jaan le lunga...​

Answer 1

Answer:

In a Euclidean space, the sum of angles of a triangle equals the straight angle (180 degrees, π radians, two right angles, or a half-turn). A triangle has three angles, one at each vertex, bounded by a pair of adjacent sides.

Answer 2

Refers to the above attachment

A ΔABC

To Prove:- ∠A + ∠B + ∠C = 180°

∠1 + ∠2 + ∠3 = 180°

Construction:- Through A draw lm II BC

Proof:- Since, lm II BC

Therefore, ∠2 = ∠4 .... eq(i)

∠3 = ∠5 .... eq(ii)

Adding, eq(i) and eq(ii), we get

∠2 + ∠3 = ∠4 + ∠5

Adding ∠1 both side, we get

∠1 + ∠2 + ∠3 = ∠1 + ∠4 + ∠5

∠1 + ∠2 + ∠3 = 180°

thus, the sum of all interior angles of a triangle is equal to 180°.

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