In the figure, ABC is an equilateral triangle, and DAB is a right triangle. What is the area of the circumscribed circle

This topic has expert replies
Legendary Member
Posts: 2898
Joined: Thu Sep 07, 2017 2:49 pm
Thanked: 6 times
Followed by:5 members

Timer

00:00

Your Answer

A

B

C

D

E

Global Stats

1.gif
In the figure, \(ABC\) is an equilateral triangle, and \(DAB\) is a right triangle. What is the area of the circumscribed circle?

(1) \(DA = 4\)
(2) \(\angle ABD = 30\) degrees

Answer: A

Source: Manhattan GMAT
Source: — Data Sufficiency |