A right triangle has one exterior angle that's 90 degrees. No other kind of triangle has. All three of the triangle's exterior angles always add up to 360 degrees.
135 degrees.
Consider a right triangle. One of the exterior angles 90 degrees.
A isosceles right angle triangle will have 2 equal interior angles of 45 degrees and 1 angle of 90 degrees with its largest exterior angle being 180 -45 = 135 degrees.
Their exterior angles add up to 360 degrees.
It could be a right triangle if it has a right angle (90 degrees). If it does not have a right angle, then it is an acute triangle.
A right triangle
No an obtuse triangle cant be a right angle because,a right angle is 90 degrees. a obtuse triangle is over 90 degrees
It is a right triangle or right-angled triangle. The right-angle is 90 degrees.
Because the phrase 'right angle' indicates 90 degrees whereas there is no such angle as a 'left angle'
A right triangle has a right angle (thus called a right triangle), 90 degrees
A right angle triangle has a right angle and two acute angles that all add up to 180 degrees.