Name the line segments of the given figure:

In the given figure, $AB\parallel CD, \angle ABO=40°$ and $\angle CDO=35°$. Then the value of $x$ will be

The wheels of a car are of diameter $80 \mathrm{c}\mathrm{m}$ each. How many complete revolutions does each wheel make in 10 minutes when the car is traveling at a speed of $66 \mathrm{k}\mathrm{m}$ per hour? $\left(\mathrm{use} \pi =\frac{22}{7}\right)$

Only one circle can be drawn through three non collinear points.

The number of planes passing through $3$ non-collinear points are

A ray has definite length.

Take any points $A, B, C, D and E$ in such a way that no three points are collinear.

Join them in pairs and answer the following:

How many of the points pass through $D$ if the lines can be drawn joining two points at a time? 

Take any points $A, B, C, D and E$ in such a way that no three points are collinear.

Join them in pairs and answer the following:

How many of the points pass through $A$ if the lines can be drawn joining two points at a time? 

Mark three non-collinear points $\mathrm{A}, \mathrm{B}, \mathrm{C}$ as shown. Draw lines through these points taking two at a time. Name the lines. How many such different lines can be drawn?

A ray extends indefinitely in both directions.

A point $C$ is said to lie between the points $A$ and $B$ if

What do you mean by collinear points? How many lines can you draw passing through three collinear points?

The number of ray(s) starting from one given point and passing through another fixed point is:

The length of a line is measurable.