Acute. More precisely, 60 degrees each.
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
Types of triangle ; EQUILATERAL all three sides the same length and all three angles are 60 degrees. ISOSCELES Two sides the same length and two angles have the same degrees value. RIGHT-ANGLED All three sides can be of different lengths. However, it MUST have one Right-Angle (90 degrees) SCALENE All three sides of different lengths and all three angles of different angular values. NB In ALL four cases the sum of the interior angles MUST ADD TO 180 DEGREES.
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.