Answer:
a = 43
Explanation:
The triangle is isosceles if PQ = RQ and P is not 60 degrees.
<P = <R Property of an isosceles triangle
2a + 47 + 47 = 180 Every triangle = 180 degrees.
2a + 94 = 180 Combine like terms on the left. Subtract 94 both sides
2a + 94 - 94 = 180 - 94
2a = 86 Divide by 2
2a/2 = 86/2
a = 43