6.1 Angles and tangent of circles

Angle subtended at the centre :

Angle subtended at the circumference:

Angle subtended at the centre:

Angle subtended at the circumference:

Angle subtended at the centre:

Angle subtended at the circumference:

Angle subtended at the centre:

Angle subtended at the circumference:

Find the value of x, given that O is the centre of the circle.

• 30

• 40

• 15

• 20

Find the value of x, given that O is the centre of the circle.

• 290

• 70

• 35

• 145