Assuming that what you call a "traingle" is actually a triangle, the formula is that one of the vertices has a measure of 90 degrees.
isosceles right angle traingle
No triangle can ever have a reflex angle inside it.
equilateral traingle
they both measure the angle in degrees
right angle triangle
Assuming that what you call a "traingle" is actually a triangle, the formula is that one of the vertices has a measure of 90 degrees.
isosceles right angle traingle
No triangle can ever have a reflex angle inside it.
a right angle triangle has a right angle in it, whereas a traingle is the extremely general term for an object with three sides
equilateral traingle
the measure of an angle is the degrees of an angle.
you can measure a angle with a protracte.
they both measure the angle in degrees
The measure of the obtuse angle would then be double that of the acute angle.
The measure of the exterior angle.
If you mean dimensions of 5 by 9 by 13 then it is not a right angle triangle because it does comply with Pythagoras' theorem.