Angles A and B are complementary. Angle A is 87°. Find the
measure of angle B.

m∠B = 3°

Step-by-step explanation:

Complementary angles when combined will equal 90° in total.

∠A + ∠B = 90

m∠A = 87°     {Given}

Plug in 87 for ∠A in the given equation, and solve for ∠B

87 + ∠B = 90

Isolate the variable. Subtract 87 from both sides of the equation:

87 (-87) + ∠B = 90 (-87)

∠B = 90 - 87

∠B = 3°

m∠B = 3° is your answer.

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answer: it's upside down and i can't read it

step-by-step explanation:

your question is incomplete, write all the numbers in the sequence that it tells you.  

step-by-step explanation: