8. LABC & ZDEF are Complementary angles. If the measurement of ZABC is 24.7°, what is the measurement of DEF? 49.40 65.3° 155.3° 24.70

∠DEF = 65.3° (option B)
Explanation:
∠ABC and ∠DEF are complementary angles. This means both angles sum up to 90 degrees.
∠ABC = 24.7°
∠ABC + ∠DEF = 90°
24.7° + ∠DEF = 90°
∠DEF = 90° - 24.7°
∠DEF = 65.3° (option B)