Question
Find, giving a reason, the unknown marked angles, in a triangle drawn below:
✓
Answer
We know that,
Exterior angle of a triangle is always equal to the sum of its two interior opposite angles (property)
∴ 110° = x + 30° (by property)
⇒ x = 110°- 30°
x = 80°
Exterior angle of a triangle is always equal to the sum of its two interior opposite angles (property)
∴ 110° = x + 30° (by property)
⇒ x = 110°- 30°
x = 80°
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