Question

I HAVE A QUESTION

Answer 1

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Answer 2

Step 1: m∠a + m∠b + m∠c = 180° (sum of angles of a triangle)
Step 2: m∠d − m∠c = 90° (complementary angles)
Step 3: Therefore, m∠a + m∠b + m∠c = m∠d + m∠c
Step 4: So, m∠a + m∠b = m∠d

Answer 3

Instead of making posts like these why dont u just post your question .