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2y + 10° = z
3y + 2y + 10° = 180°
2y + 10° = z
5y = 170°
2y + 10° = z
y = 34°
z = 68° + 10°
x = 34°
z = 78°
180° - 34° - 78° = 68°
Miary kątów tego trójkąta wynoszą:34°, 78° i 68°
90-20=70
70/2=35
boki mają : 35, 55, 90 stopni.