Answer:
B) 32°
Step-by-step explanation:
Triangle Exterior Angle Theorem: The TEAT states that the sum of the two interior angles is equal to the opposite exterior angle.
It is given that m∠DBC = 122°. Note that m∠C is a right angle, or 90°.
Subtract:
m∠DBC - m∠C = m∠A
Plug in the corresponding numbers to the corresponding variables:
(122) - (90) = m∠A
m∠A = 122 - 90
m∠A = 32
B) 32° is your answer.
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