7a]
[A-2]×180=160A
180A-360=160A
180A-160A=360
20A=360
A=360;20=18
A= ilość boków
b]
[A-2]×180=170a
180A-170A=360
10A=360
A=360:10=36
TAK ISTNIEJE , TO 36-KĄT
8]
a=20cm
α=45⁰
p=a²×sin 45=20²×√2/2=200√2cm²
p=ah
200√2=20h
h=200√2:20=10√2cm
r=½h=½×10√2=5√2cm
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7a]
[A-2]×180=160A
180A-360=160A
180A-160A=360
20A=360
A=360;20=18
A= ilość boków
b]
[A-2]×180=170a
180A-170A=360
10A=360
A=360:10=36
TAK ISTNIEJE , TO 36-KĄT
8]
a=20cm
α=45⁰
p=a²×sin 45=20²×√2/2=200√2cm²
p=ah
200√2=20h
h=200√2:20=10√2cm
r=½h=½×10√2=5√2cm