Question

matemática urgente pra amanha

Answer 1

a) cos20 = (D/2)/hipotenusa (2,5)

0,939 = (D/2)/2,5
D/2= 0,939*2,5
D/2=2,35
D= 2,35*2
D= 4,70 cm

b)sen20 = (Dm/2)/hip(2,5)                  (sen20= 0,324)
0,324 = (Dm/2)2,5
Dm/2 = 2,5*0,324
Dm/2 = 0,855
Dm = 0,855*2
Dm = 1,71cm

c) Area = (D*Dm/2)
Area = (4,70*1,71)/2
Area = 8,03/2
Area= 4,01 cm²