An obtuse angle

An right angle

The angle of supplementary to \(90^{ 0 }\)+\(9^{ 0 }\) is

Which of the following is not a pair of complementary angles? 

The length of the common perpendiculars at different points on parallel lines is the same and is called

(a) In the figure , what value of x will make POQ a straight line:

(b)In the given figure find the value of x,If AOB is a line

In figure \(\angle \) DOB =\(87^{ 0 }\) and \(\angle \) COA =\(82^{ 0 }\) If \(\angle \)BOA \(35^{ 0 }\) and Find \(\angle \) COB and \(\angle \)COD

Lines PQ and Rs Intersect each other at O (see figure) If \(\angle \)POR;\(\angle \)ROQ=3:7 Find all the angles a,b,c and d.

In the given figure find x,if AB || CD

In the given figure if l || m then find the value of x.

In figure If x+y=w+z then prove that AOB is a line

In the given figure, \(PO\bot AB\), If x:y:z=1:3:5, then find the degree measure of x,y and z.

In the given figure, l||m||n. From the figure, find the ratio of (x+y):(y-x).

If two lines intersect each other, then the vertically opposite angles are equal. prove it

In figure if AOB is a line OP bisects \(\angle \)BOC and OQ  \(\angle \) AOC ,show that  \(\angle \)POQ is a right angle

In figure OP bisects \(\angle \) AOC,OQ bisects \(\angle \) BOC and OP \(\bot \) OQ Show that points A O and B are collinear.

In the figure below \(l_{ 1 }||l_{ 2 }\) and \(a_{ 1 }||a_{ 2 }\) find the value of x.

In figure if AB || CD then find the value of y.