Avicennaa
8. luas = (jumlah sisi sejajar) /2 x t 60 = ( 2x + 3x )/ 2 x 6 60 = 3 ( 5x) 60 = 15 x x = 4 jadi sisi sejajarnya 2x = 2(4) = 8 3x = 3 ( 4) = 12
9, caranay sama kayak atas ya,, aku ga tulis lagi ruusnya 112 = ( 2x + 5x)/2 x 8 112 = 4 ( 7x) 112 = 28 x x = 4 jadi sisi sejajarnya 2x = 2 ( 4) = 8 5x = 5 ( 4) = 20
kelilingtrapesium = 10 + 10 + 8 + 20 = 48
10 keliling = 2P + 2 L ------>. ini rumusnya 240 = 2(7x) + 2 ( 5x) 240 = 14x + 10 x 240 = 24 x x = 10
luas = (jumlah sisi sejajar) /2 x t
60 = ( 2x + 3x )/ 2 x 6
60 = 3 ( 5x)
60 = 15 x
x = 4
jadi sisi sejajarnya
2x = 2(4) = 8
3x = 3 ( 4) = 12
9,
caranay sama kayak atas ya,, aku ga tulis lagi ruusnya
112 = ( 2x + 5x)/2 x 8
112 = 4 ( 7x)
112 = 28 x
x = 4
jadi sisi sejajarnya
2x = 2 ( 4) = 8
5x = 5 ( 4) = 20
kelilingtrapesium = 10 + 10 + 8 + 20 = 48
10
keliling = 2P + 2 L ------>. ini rumusnya
240 = 2(7x) + 2 ( 5x)
240 = 14x + 10 x
240 = 24 x
x = 10
ukurannya
panjang = 7x = 7(10) = 70
lebar = 5x = 5 (10) = 50