Calcola la misura del contorno e l' area della figura colorata, sapendo che: AB=BC=CD=DE= 10 cm.
Calcola la misura del contorno e l' area della figura colorata, sapendo che: AB=BC=CD=DE= 10 cm.
97
punti
Livello 1
155)
Perimetro:
$2p= \bigg(4×\dfrac{10}{2}+2×\dfrac{2×10}{2}\bigg)π$
$2p= (2×10+2×10)π$
$2p= (20+20)π$
$2p= 40π~cm~~(≅ 125,66~cm).$
Area:
$A= \bigg(2×2×\dfrac{10^2}{4×2}+2×\dfrac{(2×10)^2}{4×2}\bigg)π$
$A= \bigg(4×\dfrac{100}{8}+2×\dfrac{400}{8}\bigg)π$
$A= \bigg(\dfrac{100}{2}+\dfrac{400}{4}\bigg)π$
$A= \big(50+100\big)π$
$A= 150π~cm^2~~(≅ 471,24~cm^2).$
68301
punti
Genius I