Tolong kerjain no.27 dan 28

27. 180 = 35 + 85 + x
180 = 120 + x
180-120 = x
x = 60°

w + 85 = 180
w = 180-85
w = 95°

y + x = 180
y + 60 = 180
y = 180-60
y = 120°

z + 35 = 180
z = 180-35
z = 145°

28. a) 3x + x = 180
4x = 180
x = 45

b) <SPR = 3x
<SPR = 3 * 45
<SPR = 135°

c) <RPQ = x = 45°
45 + 80 + <PRQ = 180
125 + <PRQ = 180
<PRQ = 180-125
<PRQ = 55°