If the triangle has a 30 degree angle and a 60 degree angle then the 3rd angle must be a 90 degree angle because there are 180 degrees in a triangle and so therefore it is a right angle triangle.
A right angle triangle
If a triangle has a 100 degree angle, it is an obtuse triangle because a 100 degree angle is an obtuse angle. angle > 90 = obtuse angle = 90 = right angle < 90 = acute
A right triangle is a triangle in which one angle is a right angle (that is, a 90-degree angle). The relation between the sides and angles of a right triangle is the basis for trigonometry.
The third angle is 68 degrees which makes it a scalene triangle
A right angle triangle
A 90o angle is a right angle, and a triangle with a right angle is called a right triangle.
right triangle.
A right triangle
A right triangle.
a right triangle
the angle with a value from 90 degree-180 degree