Question

6. Measure of each interior angles of a regular pentagon is

(a) 120o (b) 108o

(c) 100o

(d) 72o 1

7. The perpendicular distance of a pointfrom y-axis is known as

(a) ordinate (b) origin (c) abscissa (d) None of these 1

8. Quotient obtained when the polynomial

+ 7 − 4 is divided by + 7 is

(a) + 2 (b) + 4 (c) − 4 (d)

1

9. If the surface area of one of the faces of a cube is 25

, then its volume is

(a) 125

(b) 125

(c) 125 (d) None of these 1

10. A bag contains 3 red balls, 4 white balls and 5 black balls. One ball is drawn at random

from the bag. What is the probability that the ball drawn is of green colour?

(a)



(b)



(c) 1 (d) 0

1

(Q.11- Q.15) Fill in the blanks

11. 25 can be expressed as the sum of first ______________ consecutive odd numbers. 1

12. The distance between the points P(0, 2) and Q(0, 6) is _________________ . 1

13. Two lines in a plane which are parallel to a given line in the same plane are ____ to each

other. 1

14. The sum of the exterior angles of any polygon is ________.

OR

Number of diagonals in a pentagon are ______________ .

1

15. The volume of a cube of edge 0.01 m is __________ cm

3

1

(Q.16- Q.20) Answer the following

16. Find the value of 625







. 1

17. If ! is directly proportional to and = 2 when ! = 20. Find the value of the constant

of variation.

1

18. Write down a trinomial of degree 4. 1

19. The area of a square is

− 6 + 9 sq. units. Find its perimeter.

OR

If 10 = 62 − 52

, find .

1

20. A die is thrown once. Find the probability of getting an odd prime number. 1​

Answer 1

Formula for finding measure of interior angles of a regular polygon:-

180(n-2)/n

Here, n is the no. of sides.

So,measure of each interior angle of a regular Pentagon is :-

180(n-2)/5

= 180(5-2)/5

= 180×3/5

= 540/5

= 108°