Wong Wei Jie's answer to Alaya's Secondary 1 Maths Singapore question.
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Sum of interior angles of a polygon = (n - 2) × 180°
where n is the no. of sides of the polygon
Sum of interior angles of a polygon
= (5 - 2) × 180°
= 540°
Last interior angle
= 540° - 135° - 100° - 85° - 70°
= 150°
Angle x
= 180° - 150° (angles on a straight line)
= 30° (Ans)
where n is the no. of sides of the polygon
Sum of interior angles of a polygon
= (5 - 2) × 180°
= 540°
Last interior angle
= 540° - 135° - 100° - 85° - 70°
= 150°
Angle x
= 180° - 150° (angles on a straight line)
= 30° (Ans)
Date Posted:
3 years ago
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