Answer:
z = 24°
Step-by-step explanation:
The 3 angles 48, x and x form a straight angle and sum to 180°, thus
x + x + 48 = 180
2x + 48 = 180 ( subtract 48 from both sides )
2x = 132 ( divide both sides by 2 )
x = 66
The 3 angles in a triangle sum to 180°
sum the 2 known angles and subtract from 180
z = 180° - (66 + 90)° = 180° - 156° = 24°
