66
It is a right angle.
acute
A right-angled triangle.
A right triangle because the 90 degree angle creates a corner.
An acute angle.
66 degree angle
66
It is a right angle.
An obtuse angle
acute
an angle of a degree greater than ninety
A straight line is equal to a 180 degree angle.
It is a reflex angle because it is greater than 180 degrees
Acute
Those triangles with 25 and 90 degree angles are called right angle triangle.
An obtuse angled triangle.