M l aggarwal understanding icse mathematics class 8 Solutions for Chapter 15 circle

Draw a circle with center O and radius 2.5 cm. Draw two radii OA and OB such that ∠AOB = 60. Measure the length of the chord AB.

State whether the following statements are true (T) or false (F) :

(i) A parallelogram has diagonals as its lines of symmetry.

(ii) A regular triangle has three lines of symmetry, one point of symmetry, and has

rotational symmetry of order 3.

(iii) A regular quadrilateral has four lines of symmetry, one point of symmetry and

has . The rotational symmetry of order 4.

(iv) A parallelogram has no rotational symmetry.

(v) A regular pentagon has one point of symmetry.

(vi) The letter Z has one line of symmetry.

Draw a circle of radius of 3.2 cm. Draw a chord AB of this circle such that AB = 5 cm. Shade the minor segment of the circle

Find the length of the tangent drawn to a circle of radius 3 cm, from a point at a distance 5 cm from the centre.

The number of lines of symmetry which a quadrilateral cannot have

(a) 1

(b) 2

(c) 3

(d) 4

In the adjoining figure, PT is a tangent to the circle with centre C. Given CP = 20 cm and PT = 16 cm, find the radius of the circle.

In each of the following figure, O is the center of the circle. Find the size of each lettered angle

In each of the following figures, O is the center of the circle. Find the values of x

and y.