Page 12 - Flip Book_Aliyah Rumini Larasati_4192111004

Figure 12. shows that

∠ = ° and ∠ = °

apply

° + ° = 180°

° = 180° − °

° = 180° − °

The relationship between ° and ° is called a straight angle (sudut berpelurus).

Figure 12. Straight Angle (sudut berpelurus)

The sum of two complementary angles is 180°. One angle is the complement of the other angle.

Couple of Opposite Angles

Figure 13. Opposite Angles

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