tolong bantu jawab no 39 dan 40 beserta cara nya ini yang terakhir

Mapel : Matematika
Bab : Bangun datar

39)

[tex]ed = \sqrt{15 ^{2} - 9 ^{2} } [/tex]
[tex]ed = \sqrt{225 - 81} [/tex]
[tex]ed = \sqrt{144} [/tex]

[tex]ed = 12cm[/tex]


K = 12 + 9 + 10 + 10 + 15
K = 56 cm

A

40)

d1 = 24 ==> = 1/2d1 = 12 cm

d2 = 32 ===> 1/2d2 = 16 cm

Sisi miring = V16^2 + 12^2
Sisi Miring = V256 + 144
Sisi Miring = V400
Sisi Miring = 20 cm

K = 4(Sisi miring) = 4(20) = 80 cm

C