No.
Consider a right triangle. One of the exterior angles 90 degrees.
No, an equilateral triangle does not have right angles. All three interior angles of an equilateral triangle are equal and measure 60 degrees each. Since right angles measure 90 degrees, an equilateral triangle cannot contain any right angles.
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.
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.
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,
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.