Angles, polygons and parallel lines

Question 1 of 10

Find the sum of the interior angles of a polygon with 9 sides.

Question 2 of 10

A rhombus has four equal sides.

Question 3 of 10

The angles of a quadrilateral are 2x°, 3x°, (x + 20)° and y°. If y = 256, (a) form an equation, (b) find x, (c) find the size of each angle.

Question 4 of 10

Each exterior angle of a regular polygon is 15°. How many sides does it have?

Question 5 of 10

The interior angles of a pentagon add up to 540°.

Question 6 of 10

The sum of the interior angles of a 15-sided polygon is ___°.

Question 7 of 10

Each exterior angle of a regular polygon is 18°. How many sides does it have?

Question 8 of 10

The sum of the interior angles of an n-sided polygon is

Question 9 of 10

The angles of a quadrilateral are 2x°, 3x°, (x + 20)° and y°. If y = 202, (a) form an equation, (b) find x, (c) find the size of each angle.

Question 10 of 10

An exterior angle of a triangle equals