Discovering Mathematics Book 8>Chapter 13 - Chords and Angles of Circles>REVISION EXERCISE>Q 9

EASY

8th CBSE

IMPORTANT

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A regular polygon is inscribed in a circle. If the central angle formed by each side is $40 °$ , what is the number of sides of the polygon?

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Important Questions on Chords and Angles of Circles

EASY

8th CBSE

IMPORTANT

Discovering Mathematics Book 8>Chapter 13 - Chords and Angles of Circles>REVISION EXERCISE>Q 10

Question Image

The value of $∠ x =$ _____ $°$ .

EASY

8th CBSE

IMPORTANT

Discovering Mathematics Book 8>Chapter 13 - Chords and Angles of Circles>REVISION EXERCISE>Q 10

Question Image

The value of $∠ x =$ _____ $°$ .

EASY

8th CBSE

IMPORTANT

Discovering Mathematics Book 8>Chapter 13 - Chords and Angles of Circles>REVISION EXERCISE>Q 11

Two chords

A B

and

C D

are in a circle with centre

O

.

m ∠ A O B = m ∠ C O D = 130 °

. The length of

A B = 16 cm

. If the length of

C D

is

k cm

then find

k

.

EASY

8th CBSE

IMPORTANT

Discovering Mathematics Book 8>Chapter 13 - Chords and Angles of Circles>REVISION EXERCISE>Q 12

Two arcs

\overset{⏜}{P Q}

and

\overset{⏜}{A B}

subtend

70 °

each at the centre of a circle. The length of the arc

\overset{⏜}{A B}

is

14 cm

. If the length of arc

\overset{⏜}{P Q}

is

k cm

, then find

k

.

EASY

8th CBSE

IMPORTANT

Discovering Mathematics Book 8>Chapter 13 - Chords and Angles of Circles>REVISION EXERCISE>Q 13

The length of two arcs

\overset{⏜}{A B}

and

\overset{⏜}{C D}

of a circle with centre

O

is in the ratio

1 : 2

. The measure of

∠ A O B

is

60 °

. If

∠ C O D = k °

, then find the value of

k

.