Question

TOLONG Ya BANTUIN NO 2,3 :) :) :) :)

Answer 1

Nomor 2
a.) EB = 2\/13^2 - 12^2
. = 2\/169 - 144
. = 2\/25
. = 5 cm
AB = 2\/12^2 + 5^2
. = 2\/144 + 25
. = 2\/169
. = 13 cm
b.) k = s + s + s + s
. = 10 + 13 + 24 + 13
. = 23 + 24 + 13
. = 47 + 13
. = 60 cm
c.) L = (ssj 1 + ss2) × t × 1/2
. = (10 + 24) × 12 × 1/2
. = 34 × 12 × 1/2
. = 34 × 6
. = 204 cm2
nomor 3
Diketahui
ssj 1 = 30 cm
t = 12 cm
L = 300 cm2
Ditanya
K = ....
Jawab
L = (ssj 1 + ssj 2 ) × t × 1/2
300 = ( 30 + ssj 2 ) × 12 ×1/2
300 = ( 30 + ssj 2 ) × 6
300 = 30 ssj × 6
30 ssj = 300/6
30 ssj = 50
ssj = 50 - 30
ssj = 20
s = 2\/ 12^2 + 5^2
. = 2\/ 144 + 25
. = 2\/ 169
. = 13 cm
K = s + s + s + s
. = 13 + 13 + 20 + 30
. = 26 + 20 + 30
. = 46 + 30
. = 76 cm
Jadi trapesium 76 cm
ket
2\/ = akar pangkat 2
^ = pangkat
ssj = sisi sejajar
maaf kalo salah