A right angle triangle has one 90 degree angle and two acute angles
a 90 degree angle
A right angle triangle must have a 90 degree angle and two acute angles.
A 5 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
A 90 degree angle is also known as right angle. A right angle (or 90 degrees) looks like an L shape. A square or rectangle's four corners are all 90 degrees.
A right angle.
A 60 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
A 60 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
A 90 degree angle is a right angle.
They are two edges that make a 90 degree angle. However, the term is also loosely used for edges that make a 90 degree angle with the horizontal.
Lines that form a 90 degree angle at their vertex. Two lines that make a 90 degree are perpendicular.
Rotation preserves shape - therefore the angle before the rotation equals the angle after the rotation.