Question 55 Answer and Explanation _ACT June 2010 Form 68C Math Section

Question 55 Answer and Explanation _ACT June 2010 Form 68C Math Section

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55. In the figure below, lines a and b are parallel, the angle measure y is in degrees, and ∠1 and ∠2 have the same measure. In terms of y, which of the following is equivalent to the degree measure of ∠3 ?

A. $\frac{{y}^{\circ}}{2}$

B. y°

C. 90° - y°

D. 90° -

E. 189° - y°

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

∠3=∠1=0.5×∠y. Choose A.