Cc une petite aide svp ?:).... Pergunta de ideia deshiraki

shiraki @shiraki

December 2020 1 75 Report

Cc une petite aide svp ?:)

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barthyanastro007

☺ SALUT ☺

✯ FORMULES ✯

$Aire\:demi-cercle\:= \dfrac{(π × {R}^{2})}{2}$

$Aire\:triangle\:= \dfrac{b × h}{2}$

$Aire\:parallélogramme\:= b × h$

$R\: : \: rayon$

$b\: : \: base$

$h\: : \:hauteur$

๏ Calculons l'aire du demi-cercle :

$Aire\:demi-cercle\:= \dfrac{(π × {R}^{2})}{2}$

On a :

$D = 5\:cm → \:R = 2,5 \:cm$

$A\:=\: \dfrac{(π × {2,5}^{2})}{2}\:{cm}^{2}$

$A\:=\: \dfrac{(π × 6,25)}{2}\:{cm}^{2}$

$A\:=\: \dfrac{19,6}{2}\:{cm}^{2}$

$A\:=\: 9,8\:{cm}^{2}$

๏ Calculons l'aire du triangle rectangle :

$Aire\:triangle\:= \dfrac{b × h}{2}$

$On\:a\::$

$b = 7\:cm$

$h = 5\:cm$

$A\:= \dfrac{35}{2}\:{cm}^{2}$

$A\:= 17,5\:{cm}^{2}$

๏ Calculons l'aire du parallélogramme :

$Aire\:parallélogramme\:= b × h$

$On\:a\::$

$b = 8\:cm$

$h = 7\:cm$

$A\:= (8 × 7){cm}^{2}$

$A\:= 56\:{cm}^{2}$

๏ Calculons l'aire de la figure :

$Aire\:totale\:=\:la\:somme\:des\:aires$

$A = (9,8 + 17,5 + 56)\:{cm}^{2}$

$\boxed{\boxed{\overbrace{\underbrace{A = 83,3\:{cm}^{2}}}}}$

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