Oblicz pole powierzchni graniastoslupa prostego ktorgo krawedz boczna ma 10 cm, a podstawa jest:
a)trojkatem prostokatnym o bokach 5 12 13 b) rownoleglobokiem o bokach dlugosci 8 i 6 , ktorego wysokosc opuszczona na krotszy bok ma dlugosc 5 c) trapezem prostokatnym o podstawach dlugosci 2 i 6 , gdzie krotsze ramie ma dlugosc 3
crronaldo
A) S = 2P+M M = (a+b+c)h P=½ab a = 5 b = 12 c = 13 h = 10 P = ½5×12 = 30 M = (5+12+13)×10 = 30×10 = 300 S = 2×30+300 = 360cm²
b)S = 2P+M M = (a+b)h P = ac a = 6 b = 8 c = 5 h = 10 P = 6×5 = 30 M = (6+8)×10 = 14×10 = 140 P = 2×30 + 140 = 200cm²
M = (a+b+c)h
P=½ab
a = 5
b = 12
c = 13
h = 10
P = ½5×12 = 30
M = (5+12+13)×10 = 30×10 = 300
S = 2×30+300 = 360cm²
b)S = 2P+M
M = (a+b)h
P = ac
a = 6
b = 8
c = 5
h = 10
P = 6×5 = 30
M = (6+8)×10 = 14×10 = 140
P = 2×30 + 140 = 200cm²