Trigonometry is the branch of mathematics that deals with right triangles, and given TWO pieces of information (a side and an angle or two sides), you can calculate everything else about that triangle. (Note that having only two ANGLES does NOT provide enough information to calculate the length of the sides though...)
Check out these articles for a simple free tool and tutorial that will make trig simple enough for ANYBODY to do!
http://www.ehow.com/how_5227490_pass-mind-part-unknown-sides.html
http://www.ehow.com/how_5428511_pass-part-ii-unknown-angles.html
NON right angles can be calculated using the Law of Sines and the Law of Cosines.
there will be a right angle in the triangle.
It can be any length; a right angle triangle just needs to include a right angle somewhere. But length has nothing to do with whether it is a right angle or not.
If one of the angles in a triangle is exactly 90 degrees, then it is a right-angle triangle.
By using Pythagoras' theorem for a right angle triangle.
equilateral right triangle
If a triangle has a right angle, it is a right triangle.
there will be a right angle in the triangle.
It can be any length; a right angle triangle just needs to include a right angle somewhere. But length has nothing to do with whether it is a right angle or not.
If one of the angles in a triangle is exactly 90 degrees, then it is a right-angle triangle.
By using Pythagoras' theorem for a right angle triangle.
A right scalent triangle is a triangle with a right angle and no sides equal in length.
A right-angled triangle can be an Isosceles Triangle, but NOT an equilateral triangle. An Isosceles triangle has two sides of equal length. They form the 90 degree (right angle). The hypotenuse is opposite the right angle, and is longer than the other two sides.
a triangle with two sides the same length and no right angle
equilateral right triangle
An isosceles triangle is a triangle that has two sides of equal length. A right triangle has an interior angle of 90 degrees. A right isosceles triangle has both characteristics. The 90 degree angle will be the angle formed by the sides of equal length.
An isoceles triangle has two angles that are the same length with the third being different. It can be a right angle or another angle. or it's also called a Right Isosceles triangle.
A right angle triangle is a triangle with an angle 90 degrees. An isosceles triangle is a triangle with two or more equal angles/ length of lines. An equilateral triangle can also be an isosceles triangle.