You can measure a 90 degree angle by using a protractor and drawing a small line were you see the 90 degree mark at the very top.
right angle triangle
That's a reflex angle. 0 to <90 Acute angle 90 Right angle >90 to <180 Obtuse angle 180 Straight angle >180 to <360 Reflex angle 360 called Full circle
90% of a degree
In a circle ,there are 4 quadrants,each quadrant have 90 degree angle, therefore 4x90=360 degree so 361 degree angle will be in first quadrant.
Suppose the angle is x. Then its complement is 90-x. So x = (90-x) + 28 = 118 - x So 2x = 118 and x = 59 (with complement 31).
An angle whose degree measure is between 0 and 90 is an acute angle. An angle whose degree measure is between 90 and 180 is an obtuse angle. These are basic properties of geometry.
put the protractor on the vertex and look up at the degree's and look belowacute angle =has a measure between 0 degree's and 90 degree'sright angle =has a measure of 90 degree'sobtuse angle = has a measure between 90 degree's and 180 degree'sstraight angle = has a measure of 180 degree'sthat's how you use a protractor to measure angles.
An obtuse angle
An obtuse angle
90 < angle < 180
90 degrees
90 degrees
Obtuse.
A right angle.
The complement of any angle, given that the angle is less than 90 degrees, is 90 minus the angle measure. In other words, it is, "What degree measure, when added to the original angle, creates 90 degrees?"
Two angles that together measure 90 degrees are called complementary angles. For example, a 30-degree angle and a 60-degree angle are complementary because their sum is 90 degrees. Another example is a 45-degree angle paired with another 45-degree angle.
90 - 20 = 70 degrees.