Mathematics Class 9 Revision

1)

In the figure shown, AB is a chord of length 8cm, and perpendicular distance from centre is 3cm. Find the radius of the circle.

• 5 cm

• 4 cm

• 6 cm

• 7 cm

In the figure, O is the centre of the circle. AB and PQ are two chords at equal distances from the centre. AB = 12cm, OC = 8 cm. Choose the correct option;

• PQ = 12 cm, radius = 9 cm

• PQ = 10 cm, radius = 9 cm

• PQ = 12 cm, radius = 10 cm

• PQ = 10 cm, radius = 12 cm

In the figure O is the centre of the circle. AB & CD are parallel chords. The diameter of the circle is 30cm. AB = 18cm, CD = 24 cm. Find the distance between AB and CD.

• 21 cm

• 12 cm

• 20 cm

• 18 cm

In the figure, O is the centre of the circle. AB is perpendicular to CD. PA = 8cm, PB = 2cm. What is the length of CD?

• 10 cm

• 7 cm

• 9 cm

• 8 cm

In the figure AB is diameter and AC is a chord. If AB = 26cm and AC = 10 cm. Find the distance between the centre and the chord AC.

• 10 cm

• 13 cm

• 12 cm

• 8 cm

The area of the triangle whose base is 12 cm and height 10 cm is:

• 120 cm²

• 60 cm²

• 30 cm²

• 240 cm²

Write the decimal form of ¹⁴/₄₀

• 0. 25

• 0. 35

• 0. 45

• 0. 5

• 0.333.....

• 0.222...

• 0. 6666....

• 0. 111....

Write 0.34 in the form of p/q

• 34/10

• 34/100

• 34/1000

• 34/20