The measure of the angle in a semicircle is

Angles in the same segment are

The circle that passes through the vertices of a triangle is called its

If ABCD is a cyclic quadrilateral, then $\mathrm{\angle }A+\mathrm{\angle }C\backslash angle\; A+\backslash angle\; C$ =

If the sum of the pairs of opposite angles of a quadrilateral is ${180}^{\circ }180^\backslash circ$, then the quadrilateral is

In the given figure, ‘O’ is the centre of the circle, then the value of y is

Which part of a circle divides it into two semicircles?

Concentric circles have

In the given figure, if ‘O’ is the centre of the circle and AC = BC, then the measure of x is

The number of a non-collinear points required to describe a circle is