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Question
Some angles are given below. Using the symbol of congruence write the names of the pairs of congruent angles in these figures.
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Solution
OB is the angle bisector of ∠AOC.
So, ∠AOB = ∠BOC = 45°
Thus, ∠AOB ≅ ∠BOC
Also, ∠AOB ≅ ∠SRT and ∠BOC ≅ ∠RST
∠AOC = ∠PQR = 90°
∠ AOC ≅∠ PQR
∠ DOC = ∠ LMN = 30º
So, ∠ DOC ≅ ∠ LMN
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