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P=4*6=24(cm²)
2.3
P=6+3=9(cm²)
2.4
P=(3*4)/2=6
2.5
180-120=60
60/2=30
2.6
180-60-55=65 nie
2.7
4
2.8
10-1=9(m)
P=9*4=36(m²)
2.9
6²=h²+4²
36=h²+16
20=h²
h=2√5(cm)
2.10
a-bok kwadratu
a√2=8
2a=8√2
a=4√2(cm)
P=4√2*4√2=16*2=32(cm²)
3.1
25=5x
x=5
3.3
6 lub 12.. nie wiem ;p
3.6
są 2 kąty 60stopni i 2 kąty po 120 stopni
3.7
A=(-2; 1)
B=(3; 1)
C=(3; 4)
D=(-2;4)
3.9
360-45-45=270
270/2=135
135-90=45
9-5=4
4/2=2
h=2
P=9+5=14(cm²)
3.10
P=6cm²