Question

In the figure below, triangle QRS is isosceles.

Note: picture not drawn to scale

If SPQ = 35° and QRS = 36°, what is PQR?

Answer choices:
127
117
132
137

Answer 1

A) 127 would be your answer

Answer 2

<PQR = 127; Since the sum of all angles in a triangle is 180 degrees,

<SPQ+<PSQ = 125

180-125 = 55 (<PQS = 55)

Since triangle QRS is isosceles, 2 of the angles are equal, and if <QRS = 36 then:

180-36 = 144 / 2 = 72 (<RQS = 72)

Now just add the two angles (shown in parenthesis) to find <PQR, 127