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natima [27]
3 years ago
6

1) 30°. 2)60°. 3)90°. 4)None of the choices are correct.

Mathematics
2 answers:
AURORKA [14]3 years ago
6 0

Answer:

ABD is a right triangle. Therefor 30 + 4x = 90.

Solve for x.

4x = 60

x = 15

None of the answers are 15, therefor it is D.

None of the choices are correct.

Komok [63]3 years ago
6 0

Given BA and BD are perpendicular, So the angle between them is 90°

<ABD = <CBD + <CBA

90° = 4x° + 30°

60° = 4x°

4x° = <CBD = 60°

Hope it helps, if you've any doubts comment below ;))

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Answer:

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Step-by-step explanation:

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