a)
P=1/2ah
64=1/2·8·h
4h=64 |:4
h=16 cm
b)
20=1/2·4·h
2h=20 |:2
h=10 cm
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a)
P=1/2ah
64=1/2·8·h
4h=64 |:4
h=16 cm
b)
P=1/2ah
20=1/2·4·h
2h=20 |:2
h=10 cm