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BlackZzzverrR [31]
2 years ago
10

N triangle ABC (see sketch), AD is the angle bisector of the angle A and BH is the height from side AC. The obtuse angle between

BH and AD is four times the side of DAB. How big is the angle CAB?
A. 30 B.45 C.60 D.75 E.90

Mathematics
1 answer:
Alex Ar [27]2 years ago
8 0

Answer: C

Step-by-step explanation:

We know that \angle AHB=90^{\circ}, and thus by the exterior angle theorem,

90^{\circ}+\alpha=4\alpha\\\\90=3\alpha\\\\\alpha=30^{\circ}

Thus, \angle CAB=2\theta=\boxed{60^{\circ}}

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Schach [20]

If AB = BC then set up the equation 3x - 4 = 5x - 10

Subtract 3x.

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Add 10.

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Answer:

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