By using Pythagoras' theorem for a right angle triangle.
90 degree
Yes it is a way of checking a true right angle.
There is not enough information to answer the question.
For a right angle triangle: tangent = opposite/adjacent
This is the formula to find the hypotenuse of a right angle trianle
what is the formula for a vertical angle
By using the formula a2+b2=c2, where a is one side of the right-angled triangle and b is the other side of the right angle triangle. C stands for the hypotenuse of the right-angled triangle. Note: this formula only works for RIGHT-ANGLED TRIANGLES!!!
The formula for a right triangle is due to the Greek Pythagoras. It is named the Pythagorean Theorem after him. The formula is x^2+y^2=z^2, where x and y are the two legs of the right triangle and z is the hypotenuse. The hypotenuse is the side opposite the right angle. A right angle is an angle with 90 degrees. The other two angles will add up to 90 degrees because the angles in all triangles add up to 180 degrees.
If you mean: a^2 + b^2 = c^2 then it is Pythagoras' theorem or formula for a right angle triangle
Obtuse angle (here is the formula) -: 90° = Right angle and if you don't know the obtuse angle is more than 90° so adding 2 will make it an obtuse angle.
Because they both involve right angle triangles