Question 1-11th Grade Mathematics: Number and Operations Practice Test for the SBAC

The diagram shows a circle with a center at A. ADB is a right angle. EC is a line segment. Points A and D lie on this segment. Segment AE has length x, segment BD has length y, and angle BAC has measure m degrees.

Which of these statements is/are true based on the given diagram?

1. segment AD $$\cong$$ segment DC
2. sin (BAC) = $$\frac{y}{x}$$
3. EAB and CAB are complementary angles
4. segment EC $$\cong$$ 2(segment EA)
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