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Geometry practice
Interior and exterior angles of polygons · 1–4
Find the angle measure or the number of sides.
1.Find each interior angle of a regular polygon with 30 sides.
2.Find each interior angle of a regular polygon with 9 sides.
3.Find each exterior angle of a regular polygon with 12 sides.
4.Find each exterior angle of a regular polygon with 6 sides.
Properties of parallelograms · 5–8
ABCD is a parallelogram. Find the value of x.
5.Find x. 6.Find x. 7.Find x. 8.Find x. Area of regular polygons · 9–12
Find the area.
9.A regular polygon with 12 sides has an apothem of 14.6 cm and sides of 15 cm. Find its area.
10.A regular polygon with 10 sides has an apothem of 13.8 cm and sides of 9 cm. Find its area.
11.A regular polygon with 8 sides has an apothem of 7.7 cm and sides of 11 cm. Find its area.
12.A regular polygon with 8 sides has an apothem of 8.5 cm and sides of 4 cm. Find its area.
Answer key — Geometry practice
Interior and exterior angles of polygons
Properties of parallelograms
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