obtuse angle
This is a good site: http://www.mathsisfun.com/geometry/degrees.html An angle of 90--called a 90 degree angle and a right angle--is the angle made where the wall touches the floor. Or draw a plus sign--the lines intersect making four 90 degree angles.
It depends whether you mean 3 is an angle or not And if it is it is 90 + 180 + 3=273.
acute
The angles are supplementary if they have a sum of 180 degrees.
It is an exterior angle and an interior angle plus an exterior angle add up to 180 degrees
1 plus 2 is equal to 3
In mathematics, an obtuse angle is defined as an angle greater than 90° and less than 180°. A right angle is 90°. An acute angle is greater than 0°, but less than 90°. Therefore, a 90° right angle plus any acute angle will always fulfill the requirements of an obtuse angle.
Acute
plus the angle degrees with the angle complement so equals into 135 degrees
9 degrees
Plus and minus.
If you write it so the middle angle is a right angle, "K" fits the description.