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\angle a∠aangle, a and \angle b∠bangle, b are complementary angles. \angle a∠aangle, a measures 78^\circ78
∘
78, degrees.
What is the measure of \angle b∠bangle, b?

Answer :

Answer:

Step-by-step explanation:

∠ a+∠ b=90

78+∠ b=90

∠ b=90-78=12°

Answer:

12 degrees

Step-by-step explanation:

Step-by-step explanation:

∠ a+∠ b=90

78+∠ b=90

∠ b=90-78=12°

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