Odpowiedź:
fig. 1
50 stopni +90 st = 140 st
180 st-140 st = 40 st
alfa = 40 st
fig. 2
47 st + 65 st = 112 st
180 st - 112 st = 68 st
beta = 68 st
fig. 3
naprzemianległe więc gamma ma 65 stopni
fig. 4
180 st - 150 st = 30 st
100 st + 30 st = 130 st
180 st - 130 st = 50 st
alfa = 50 st
fig. 5
90 st + 30 st = 120 st
180 st - 120 st = 60 st
beta = 60 st
fig 6
40 st + 30 st = 70 st
180 st - 70 st = 110 st
gamma = 110 st
