3 Find mLABC. A (50-x) ✓ B 80° (2x + 40)° D

Ron Gahlot asked Dec 11, 2023

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28 votes

3 Find mLABC.
A
(50-x)
✓
B
80°
(2x + 40)°
D

Ron Gahlot asked Dec 11, 2023

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24 votes

Answer:

∠ ABC = 40°

Explanation:

the 3 angles lie on a straight line ABE and sum to 180° , that is

50 - x + 80 + 2x + 40 = 180

x + 170 = 180 ( subtract 170 from both sides )

x = 10

Then

∠ ABC = 50 - x = 50 - 10 = 40°

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