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a = b+15
180 = 2b + b + 15
165 = 3b
b = 55 stopni
odp. Trójkąt ten ma kąty : 55 , 55 i 70
2.
e = 2a
e+12= 3a
2a + 12 = 3a
a= 12
Odp. Ewa ma 24 plyty a adam 12
3.
a = b -6
5a = 2a +2b
5b - 30 = 2b -12 + 2b
b = 18
a = 12
2x+y=180
x+15=y
2x+x+15=180
x+15=y
3x=165
x+15=y
x=55
y=70
2)
2x=y
y-12=3x
2x-12=3x
2x=y
x=12
2x=y
y=24
3)
x-6=y
(2x+2y)=5x
x-6=y
(2x+12+2x)=5x
x-6=y
4x+12=5x
x-6=y
x=12
y=6
pole 6*12=72cm