Any angle between 0 degrees and 90 degrees is called an "acute" angle.
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Ah, what a happy little question! If we're looking for an angle that measures 80 degrees, we can find it in a triangle as one of the interior angles, or even as a part of a larger angle in a circle. Just remember, angles can be found in all sorts of shapes and sizes, like little friends waiting to be discovered on your canvas.
Angle a is 80 degrees, what is the measure of angle d?
100 degrees
An angle that measures 210 degrees is a reflex angle.
The 3rd angle is: 180-55-80 = 45 degrees
a right angle measures 90 degrees
It is a right angle triangle and its 3rd angle is 70 degrees.