prove that sum of interior angles is 180°
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Given :- Δ PQR with angles ∠1, ∠2 and ∠3
Prove :- ∠1 + ∠2 + ∠3 = 180°
Construction:- Draw a line XY passing through P parallel to QR
Proof: Also, for line XY ∠1 + ∠4 + ∠5 = 180° ∠1 + ∠2 + ∠3 = 180°
Given :- Δ PQR with angles ∠1, ∠2 and ∠3
Prove :- ∠1 + ∠2 + ∠3 = 180°
Construction:- Draw a line XY passing through P parallel to QR
Proof: Also, for line XY ∠1 + ∠4 + ∠5 = 180° ∠1 + ∠2 + ∠3 = 180°
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