No.
Consider a right triangle. One of the exterior angles 90 degrees.
angles that measure 90 degrees.
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.
Theorem: An measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.An exterior angle is formed by one side of a triangle and the extension of an adjacent side of the triangle.In the triangle at the right,
90 degrees
If it has no right angles, it is not a right triangle and therefore you cannot name a hypotenuse of that triangle. Which implies you cannot find that side's measure.
Is a right angled triangle.
A Triangle which do not have a right angle.
They both have exterior angles that add up to 360 degrees.
An acute triangle.
135 degrees.
Yes in a 90 45 45 triangle