Answer:
Z = 65 Y = 115
Step-by-step explanation:
z+115 = 180
z=65
y + 65 +100+80= 360
y+245 = 360
y=115
y = 115°
z = 65°
*IMPORTANT* Straight line = 180° & Squares = 360°
1) 180° - 115° = 65°
2) 360° - 100° - 80° - 65° = 115°
Also, interior angles = exterior angles
