Find the measure of the supplementary angle of an angle of $52^{\circ}$. (in $^{\circ}$)

$\angle ACD$ is an exterior angle of $\Delta ABC$. If $\angle ACD = 122^{\circ}$ and $\angle A = 68^{\circ}$,then $\angle B = \ldots$ (in $^{\circ}$)

If one angle of a triangle is equal to the sum of the other two angles,then the triangle is

The supplementary angle of the complementary angle of an angle having measure $32^{\circ}$ has measure.......... (in $^{\circ}$)

In the figure,$OD$ is the bisector of $\angle AOC$,$OE$ is the bisector of $\angle BOC$,and $OD \perp OE$. Show that the points $A, O$,and $B$ are collinear.

The angles of a triangle are in the ratio $2: 3: 4$. Find the angles of the triangle.