SSAT Math Question 291: Answer and Explanation

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Question: 291

5. In the isosceles triangle shown, find the measure of angle R.

  • A. 42
  • B. 48
  • C. 60
  • D. 66

Correct Answer: D

Explanation:

The answer is D

In an isosceles triangle, the angles opposite the sides that are the same are also the same. As there are 180 degrees in a triangle and 48° are accounted for, the remaining two angles total 132°. Divide that in half to solve for R.

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