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Question

asked Jul 19, 2021 12.6k views

1 Answer

CuriousMonkey · Answer 1 · 2021-07-25T05:23:50+0000

Answer:

∠ b = 12°

Explanation:

Complementary angles sum to 90°, thus

a + b = 90 ← substitute a = 78

78 + b = 90 ( subtract 78 from both sides )

b = 12

That is ∠ b = 12°