Answer:
Step-by-step explanation:
<RTQ = <RQT = 55° = y {isosceles triangle are equal}
<QST = <STQ = x {isosceles triangle}
: 2x + 86° = 180° {sum of angle in a triangle is 180°}
2x = 180° - 86°
2x = 94°
x = 94/2
x = 47°
