Question
Prove sum of angles of a triangle is 180°.
Answer: Draw line through A parallel BC. Alternate angles show ∠A+∠B+∠C=180°.
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Question
Answer: Draw line through A parallel BC. Alternate angles show ∠A+∠B+∠C=180°.
Question
Answer: Draw line through A parallel BC. Alternate angles show ∠A+∠B+∠C=180°.