What kind of angle is $145°$?

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? $\left(\mathrm{use} \pi =\frac{22}{7}\right)$

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

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

In the given figure, $AOB$ is a straight line and the rays $OC$ and $OD$ stands on it. If $\angle AOC=65°, \angle BOD=70°$ and $\angle COD = x°$, find the value of $x$.

In the given figure, $\mathbf{\angle }1\mathbf{}$ and $\mathbf{}\mathbf{\angle }2\mathbf{}$ are supplementary angles. If $\mathit{\angle }1$ is decreased, what changes should take place in $\mathit{\angle }2$ so that both the angles still remain supplementary.

In the given figure, $AOB$ is a straight line and the ray $OC$ stands on it. If $\angle AOC=64°$ and $\angle BOC=x°$, find the value of $x$.

What is the measure of a right angle?