Unit-3:Geometry

(a) Triangles

(b)Circles

Q1. Geometric figures having the same shape but different sizes are known as _________ figures.

(a) Similar (b) Congruent (c) Both(S&C) (d) None of these

Q2. Two polygons are said to be similar to each other if.
(i) Their corresponding angles are equal.
(ii) The lengths of their corresponding sides are proportional.

(a) Only (i) (b) Only (ii) (c) Both (d) None of these

Q3. In a triangle ABC ED ∥ CB and

AD/DB

=

5/7

. AE = 5 cm find EC.


(a) 8 (b) 9 (c) 6 (d) 7

Q4. In a triangle ABC , DE ∥ BC find x, if AD = x, BD = x + 2, AE = x - 1, EC = x - 2.


(a) 2 (b)

3/2

(c)

2/3

(d) 3

Q5. In a triangle ABC, AD is the bisector of ∠A, AB = 8 cm, AC = 6 cm , BD = 4 cm, Aand DC = x cm


(a) 5 (b) 3 (c) 2 (d) 4

Q6. The diagonals of a quadrilateral divide each other proportionally, then it is a ____________.

(a) Rectangle (b) Parallelogram (c) Trapezium (d) None of these

Q7. The length of a tangent from a point A, at a distance 5 cm from the centre of the circle is 4 cm, find the radius of the circle .

(a) 5 cm (b) 4 cm (c) 2 cm (d) 3 cm

Q8. In a circle of radius 21 cm, an are subtends an angle of 60⁰ at the centre. Find the lenth of the arc.

(a) 30 cm (b) 22 cm (c) 10 cm (d) 11 cm

Q9. Find the distance between two parallel tangents of a circle of radius 10 cm.

(a) 9 cm (b) 5 cm (c) 10 cm (d) 20 cm

Q10. The sides AB,BC and CA of triangle ABC touch a circle with centre o and radius r at P,Q and R respectively, then which relation is true .

(a) Area of triangle ABC =

1/2

(Perimetre of triangle ABC) x r
(b)Area of triangle ABC = (Perimetre of triangle ABC) x r
(c)Area of triangle ABC =

1/2

(Perimetre of triangle ABC)
(d)Area of triangle ABC =

1/2

(Perimetre of triangle ABC) - r