Question

An obtuse angle measures 180 degrees.
always
sometimes
never

Answer 1

never,because obtuse angle is an angle measuring between 90 and 180
and if an angle measures 180 then it is a straight angle

Answer 2

Never

Explanation:

Definition of Obtuse angle :

An angle whose measure is greater than 90 degree and less than 180 degree.

In other words, Obtuse angle is lies between 90 degree to 180 degree.

Here note that, it is not equal to 90 degree and 180 degree.

Because if angle = 90 degree it is "Right angle'

If angle = 180 degree it is 'Straight Angle'

So, Obtuse angle measure never 180 degree.