Question 29 Answer and Explanation _ACT December 2011 Form 70A Math Section

29. The points A, B, and D are collinear, B is between A and D, and C is a point not on $\overleftrightarrow{AD}$ . Which of the following statements about the measures of the angles formed must be true?

(Note: The figure below shows 1 possible arrangement of these points.)

A. The measure of ∠ABC is more than 90°.

B. The measure of ∠ABC is less than 90°.

C. The measure of ∠CBD is 90°.

D. The sum of the measures of ∠ABC and ∠CBD is 180°.

E. The sum of the measures of ∠ABC and ∠CBD is 90°.

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

ABD is three points and one line, so D.