How many right angles make a straight angle?

Identify the acute angle:

$9°,95°,59°,159°,195°,270°,315°,73°.$

Identify the obtuse angle:

$9°,95°,59°,159°,195°,270°,315°,73°.$

Identify the reflex angles among the following:

$9°,95°,59°,159°,195°,270°,315°,73°$

Name the acute angle made by the line segment shown in the following figure,

Name the acute angles made by the line segment show in the following figure.

If the complementary angle of $36°$ is $x°$, then find the value of $x$.

If the complementary angle of $45°$ is $k°$ then find $k$.

If the complementary angle of the following angle is $k°30\text{'}$, then find the value of $k$.

$50°30\text{'}$