a -podstawa
b-ramię
a=12cm
P=60cm²
P=½a*h
½*12*h=60
6h=60
h=10
h²+(½a)²=b²
10²+6²=b²
b²=136
b=√136=2√34
Ob=2b+a
Ob=2*2√34+12=4√34+12
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a -podstawa
b-ramię
a=12cm
P=60cm²
P=½a*h
½*12*h=60
6h=60
h=10
h²+(½a)²=b²
10²+6²=b²
b²=136
b=√136=2√34
Ob=2b+a
Ob=2*2√34+12=4√34+12