Question

Calcule x nas figuras a seguir.​

Answer 1

Área=bxh/2

SenA=h/b

h=bxSenA

A=bxcxSenA/2

a)3x5x1/2/2

15/4

b)3x3x\/3/2/2

9\/3/2/2

c)\/2/2=x/3x-2

(3x-2)\/2/2=x

3x\/2/2-2\/2/2=x

x-3x\/2/2=-2\/2/2

x(-3\/2/2+1)=-2\/2/2

x=2\/2/2/3\/2/2+1

x=2/3+1

d)a/senA=b/senB=c/senC

x/sen45=4\/3/sen120

x/2\/2=4\/3 / \/3/2

x.\/3/2=2\/2(4\/3)

x=8\/6 / \/3/2