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If AD is 6 and ADC is a right angle, what is the area of

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If AD is 6 and ADC is a right angle, what is the area of

by AAPL » Mon Aug 06, 2018 6:26 am

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Source: Manhattan GMAT

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If AD is 6 and ADC is a right angle, what is the area of triangular region ABC?

(1) Angle ABD = 60°
(2) AC = 12

The OA is C.

I think the answer is E since it is not given that BDC points are collinear. But this isn't the OA, can anyone help, please? Thanks!
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by Jay@ManhattanReview » Mon Aug 06, 2018 11:28 pm

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C

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AAPL wrote:Source: Manhattan GMAT

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If AD is 6 and ADC is a right angle, what is the area of triangular region ABC?

(1) Angle ABD = 60°
(2) AC = 12

The OA is C.

I think the answer is E since it is not given that BDC points are collinear. But this isn't the OA, can anyone help, please? Thanks!
Since ABC is a triangular region, it implies that BDC points are collinear.

Hope this helps!

-Jay
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