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P rownolegloboku= a*h
a= P:h= 32:8= 4cm
a - 6cm
b - 10cm
h - 4cm
Pp= [(6cm+10cm)*4cm]:2= 64 : 2 = 32 cm²
Równoległobok:
a = 8 cm
h = ?
Pp = 32cm²
h = 32cm² : 8cm = 4cm
h = 4cm
Odp: Wysokość opuszczona na to ramie wynosi 4 cm.
c = 8cm
Pr = Pt
Pt = 1/2 (a+b) *h
Pt = 1/2 (6cm+10cm) *4cm
Pt = 32cm²
Pr = 32cm²
32cm² = 8cm*H <--- dzielimy przez 8cm
H = 4cm