EduSahara™ Worksheet

Question 1

1.

The number of diagonals in a regular polygon with n sides is

(i)

(

n

) (

n

+

3

)

2
(ii)

(

n

) (

n

+

2

)

2
(iii)

(

n

) (

n

−

3

)

2
(iv)

(

n

) (

n

−

1

)

2
(v)

(

n

) (

n

−

2

)

2

Question 2

2.

How many sides does a triangle have?

(i)

2
(ii)

3
(iii)

4
(iv)

6
(v)

1

Question 3

3.

A polygon with 9 sides is called a

(i)

hexagon
(ii)

octagon
(iii)

decagon
(iv)

pentagon
(v)

nonagon

Question 4

4.

How many diagonals does a nonagon have?

(i)

26
(ii)

27
(iii)

28
(iv)

25
(v)

29

Question 5

5.

How many diagonals does a decagon have?

(i)

36
(ii)

38
(iii)

34
(iv)

35
(v)

32

Question 6

6.

How many sides does a decagon have?

(i)

11
(ii)

12
(iii)

9
(iv)

10
(v)

7

Question 7

7.

Find the number of sides in a regular polygon if each
exterior
angle is
60°

(i)

5
(ii)

7
(iii)

6
(iv)

9
(v)

4

Question 8

8.

How many sides does an octagon have?

(i)

11
(ii)

6
(iii)

7
(iv)

9
(v)

8

Question 9

9.

The value of each interior angle in an n-sided regular polygon is

(i)

(
360
n
) °
(ii)

(
n
360
) °
(iii)

[
(2n - 4) x 90
n
] °
(iv)

[
(2n - 4) x 180
n
] °

Question 10

10.

How many diagonals does a heptagon have?

(i)

15
(ii)

13
(iii)

12
(iv)

14
(v)

17

Question 11

11.

Sum of the interior angles in an octagon is

(i)

1085°
(ii)

1090°
(iii)

1110°
(iv)

1080°
(v)

1095°

Question 12

12.

How many sides does a heptagon have?

(i)

4
(ii)

8
(iii)

9
(iv)

7
(v)

6

Question 13

13.

Identify the figure below

(i)

heptagon
(ii)

quadrilateral
(iii)

triangle
(iv)

octagon
(v)

angle

Question 14

14.

The value of the interior angle in a regular polygon when the exterior angle is given

(i)

180°+ (exterior angle)
(ii)

360°- (exterior angle)
(iii)

90°+ (exterior angle)
(iv)

180°- (exterior angle)

Question 15

15.

How many diagonals does a pentagon have?

(i)

5
(ii)

6
(iii)

2
(iv)

4
(v)

8

Question 16

16.

How many diagonals does an octagon have?

(i)

21
(ii)

22
(iii)

19
(iv)

18
(v)

20

Question 17

17.

Identify the figure below

(i)

hexagon
(ii)

octagon
(iii)

angle
(iv)

decagon
(v)

triangle

Question 18

18.

Identify the figure below

(i)

hexagon
(ii)

octagon
(iii)

nonagon
(iv)

decagon
(v)

quadrilateral

Question 19

19.

Sum of the interior angles in a quadrilateral is

(i)

370°
(ii)

390°
(iii)

360°
(iv)

375°
(v)

365°

Question 20

20.

Sum of the interior angles in a hexagon is

(i)

725°
(ii)

735°
(iii)

730°
(iv)

720°
(v)

750°

Question 21

21.

How many sides does a pentagon have?

(i)

6
(ii)

8
(iii)

4
(iv)

5
(v)

2

Question 22

22.

A polygon with 3 sides is called a

(i)

quadrilateral
(ii)

pentagon
(iii)

decagon
(iv)

octagon
(v)

triangle

Question 23

23.

Sum of the interior angles in a decagon is

(i)

1450°
(ii)

1470°
(iii)

1440°
(iv)

1445°
(v)

1455°

Question 24

24.

Sum of the interior angles in a nonagon is

(i)

1260°
(ii)

1290°
(iii)

1275°
(iv)

1270°
(v)

1265°

Question 25

25.

How many sides does a hexagon have?

(i)

9
(ii)

6
(iii)

4
(iv)

7
(v)

5

Assignment Key