60 degrees: acute
A right-angle triangle.
Each interior angle of a regular is 108 degrees which is an obtuse angle and each exterior angle is 72 degrees which is an acute angle
right angle triangle
45 degrees is an angle, not a triangle.A triangle containing an angle of 45 degrees can be any kind of triangle except an equilateral triangle.
A right triangle is a triangle with a right angle.a right triangle is a triangle with 1 side as a right angle
Acute. More precisely, 60 degrees each.
A right-angle triangle.
Each interior angle of a regular is 108 degrees which is an obtuse angle and each exterior angle is 72 degrees which is an acute angle
right angle triangle
45 degrees is an angle, not a triangle.A triangle containing an angle of 45 degrees can be any kind of triangle except an equilateral triangle.
A right triangle is a triangle with a right angle.a right triangle is a triangle with 1 side as a right angle
An obtuse triangle.
an equaladderal triangle
A regular pentagon (5 sides)
A right triangle has a right angle (thus called a right triangle), 90 degrees
That would be a right triangle. Any triangle that has a right angle in it is a right triangle.
A right-angle triangle must have one corner of 90 degrees.