tolong jawab soal no 1!!!

a. s = 65°
p = 25 ×2 =50°
r = 180 - 50 - 65 = 65°

b. z =45°
y = 90°
x = 180 - 90 - 45 = 45°

c. n = 20°
l = 20° (sama kaki)
m = 180 - 20 - 20 = 140°