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Pole całej figury:
10*4=40
Pole zacieniowanej figury:
(10+2)*4/2=24
Procent:
24/40*100%=60%
b)
Pole całej figury:
(11+5)*2h/2=16h
Pole zacieniowanej figury:
(8+5)*h/2=7,5h
Procent:
7,5h/16h*100%≈46,9%
c)
Pole całej figury:
a*b
Pole zacieniowanej figury:
½a*½b/2=⅛ab
Procent:
⅛ab/ab*100%=12,5%
d)
Pole całej figury:
2r*2r=4r²
Pole zacieniowanej figury:
πr²
Procent:
3,14r²/4r²*100%≈78,5%