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.

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

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'

No an obtuse triangle cant be a right angle because,a right angle is 90 degrees. a obtuse triangle is over 90 degrees

A right triangle has a right angle (thus called a right triangle), 90 degrees

A right triangle with a hypotenuse of 12cm and an angle 30 degrees has an opposite angle of: 60 degrees.

A right angle triangle

A right angle triangle. (if it is a triangle)

No, a right triangle must have a right angle (by definition). Because there is 180 degrees in a triangle and a right angle is 90 degrees, that leaves the remaining two angles having to equal 90 degrees. Therefore, a triangle cannot have an obtuse angle.

A right angle triangle has a right angle and two acute angles that all add up to 180 degrees.

Any triangle that has an angle measuring 90 degrees is a right triangle.

isoselles triangleImproved Answer:-The third angle has to be 90 degrees so it is a right angle triangle.

It has 180 degrees, but one angle of the triangle has to be 90 degrees

It is a right angle triangle and its 3rd angle is 70 degrees.

A right angle triangle has only 1 right angle of 90 degrees and two acute angles that add up to 90 degrees whereas the 3 angles add up to 180 degrees

a TRIANGLE THAT HAS A 90 DEGREE ANGLE A right triangle is a triangle that has exactly 90 degrees for one angle.

A triangle with one angle measuring 90˚ is a right triangleIt's a right triangle because the 90˚ angle is a right angle

If one of the angles in a triangle is exactly 90 degrees, then it is a right-angle triangle.

In a right triangle the greatest angle is 90 degrees.

yes, a right triangle can have an angle of 45 degrees

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