Page 55 - Inovasi Modul Matematika Bangun Datar Segi Empat_Lusi Malini_Neat
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Jawab :
=
=
30 m . x = 40 m . 12 m
2
30 m . x = 480 m
x = = 6
L jalan = L tanah – L taman
L jalan = (a x t) – (a x t)
L jalan = (40 m x 16 m) – (30 m x 12 m)
2
L jalan = 640 m – 360 m 2
L jalan = 280 m 2
5. Diketahui : ∠ = ( )°
∠ = ( )°
∠ = °
Ditanya : nilai x dan y?
Jawab :
∠ = ∠
∠ = ∠
∠ ∠ ∠ ∠ = 6 °
∠ ∠ = 8 °
( )° ( )° = 8 °
3x° + 30° = 180°
3x° = 8 ° °
3x° = 5 °
53
Bangun Datar Segiempat - VII
