1. The sum of the interior angles of a regular polygon is 900°. Find the number of sides of the polygon.

7 5 6 8

2. The sum of the interior angles of a regular polygon is 540°. Find the number of sides of the polygon.

5 4 6 3

3. The diagonal of a rectangle is 10 cm long. If the length of the rectangle is 8 cm, find its breadth.

6 cm 18 cm 2 cm 36 cm

4. At eight o'clock, what is the angle between the hour hand and the minute hand of a clock?

120° 90° 150° 60°

5. Two interior angles of a triangle are (3x − 10)° and (4x + 20)°. Find an expression for the third angle.

(170 − 7x)° (190 − 7x)° (7x − 170)° (180 − 7x)°

6. Which of these best defines a vertex?

A point where two or more edges meet A flat surface of a shape A line joining two vertices The distance around a shape

7. A polygon in which all the sides and all the angles are equal is called a ______.

Regular polygon Irregular polygon Concave polygon Scalene polygon

8. Which of these is true about vertically opposite angles?

They are always equal They always add up to 90° They are always different They only occur in triangles

9. Two angles, r° and 5k°, lie on a straight line. If r = 80°, find the value of k.

20 100 16 36

10. A quadrilateral is best described as a shape with ______.

Four sides, four vertices, and four angles Three sides and three angles only Five sides and five vertices A single curved edge with no vertices