Oblicz pole trapezu KLMN, wiedząc, że pole równoległoboku KLPN wynosi 48 cm kwadratowcyh, |KL|= 8 cm oraz |PM|= 2 cm.
|KL| = |PN| = 8 cm
|PM| = 2 cm
|NM| = |PN| + |PM| = 10 cm
Pole figury KLPN = 48 cm
Wzór na pole równoległoboku: 1/2 a*h
a = 8 cm
x*8/2 = 48
x*4 = 24
24-4=6
Pole trapezu: 1/2 (a+b)*h
b = 10 cm
h = 6 cm
(8+10)*6/2 = (8+10)*3 = 18*3 = 54 cm2
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|KL| = |PN| = 8 cm
|PM| = 2 cm
|NM| = |PN| + |PM| = 10 cm
Pole figury KLPN = 48 cm
Wzór na pole równoległoboku: 1/2 a*h
a = 8 cm
x*8/2 = 48
x*4 = 24
24-4=6
Pole trapezu: 1/2 (a+b)*h
a = 8 cm
b = 10 cm
h = 6 cm
(8+10)*6/2 = (8+10)*3 = 18*3 = 54 cm2