Video Transcript
Is an angle of 140 degrees obtuse,
acute, or a right angle?
Let’s use the protractor to help us
draw an angle which measures 140 degrees. We’ve drawn our vertex on our first
ray, we’ve have lined it up with zero on the protractor, and we can use the scale to
count around to 140. Now, we’re going to draw our second
ray. The angle measures 140 degrees. We can see the measure of the angle
is greater than 90 degrees and less than 180 degrees. So, the given angle is an obtuse
angle.
We drew the angle on the protractor
and used the protractor to help us work out that an angle which measures 140 degrees
is an obtuse angle. It measures more than 90 degrees
and less than 180 degrees.
