There are many formulae for triangles:
Some formulae will calculate sides given angles or conversely.
Some will calculate the area.
It is not possible to say how you would use a formula without knowing what it is for!
Use the formula 1/2 the base * the height
hypotenuse
That is it. Just the hypotenuse - provided you have the correct triangle.
right triangle
To find the vertical distance (or height) of a triangle, you can use the formula for the area of a triangle: Area = 1/2 × base × height. If you know the area and the length of the base, you can rearrange the formula to solve for height: height = (2 × Area) / base. Alternatively, if you have the coordinates of the triangle's vertices, you can use the formula for the area based on those coordinates to find the height.
Use the formula 1/2 the base * the height
Use Heron's Formula
hypotenuse
hypotenuse
Its hypotenuse
The hypotenuse
That is it. Just the hypotenuse - provided you have the correct triangle.
right triangle
This depends what you are trying to work out, and what kind of triangle you have.
hypotenuse.
hypotenuse.
use the formula. ti