Page 32 - Modul Bangun Datar Segi Empat_Neat

160° + 2 = 360°

2 = 360° − 160°

2 = 200°

200°
=
2

x = 100°

x = ∠ = 100°

4. Diketahui : ∠ = (2 + 20)°

∠ = ( + 10)°

∠ = 3 °

Ditanya : nilai x dan y?

Jawab :

∠ = ∠

∠ = ∠

∠ + ∠ + ∠ + ∠ = 360°

∠ + ∠ = 180°

(2 + 20)° + ( + 10)° = 180°

3x° + 30° = 180°

3x° = 180° − 30°

3x° = 150°

x = = 50

Sehingga ∠ = ( + 10)°

∠ = (50 + 10)°

∠ = 60°

∠ = ∠

30

Bangun Datar Segi Empat - VII