# Triangle Equations Formulas Calculator

## Mathematics - Geometry

Right Triangle Solving for Pythagorean Theorem - length of side c - Hypotenuse: #### Inputs:

 length of side (a)
 length of side (b)

#### Conversions:

 length of side (a)= 0 = 0
 length of side (b)= 0 = 0

#### Solution:

 length of side c (c)= NOT CALCULATED

Change Equation
Select to solve for a different unknown Scalene Triangle:
No sides have equal length
No angles are equal
Scalene Triangle Equations
These equations apply to any type of triangle. Reduced
equations for equilateral, right and isosceles are below.
Law of Cosines  Equilateral Triangle:
All three sides have equal length
All three angles are equal to 60 degrees
Equilateral Triangle Equations Right Triangle:
One angle is equal to 90 degrees
Right Triangle Equations Pythagorean Theorem Perimeter Semiperimeter Area Altitude of a Altitude of b Altitude of c Angle Bisector of a Angle Bisector of b Angle Bisector of c Median of a Median of b Median of c Inscribed Circle Radius Circumscribed Circle Radius Isosceles Triangle:
Two sides have equal length
Two angles are equal
Isosceles Triangle Equations
Where
 P = Perimeter s = Semiperimeter a = Length of side a b = Length of side b c = Length of side c h = Altitude m = Median A = Angle A B = Angle B C = Angle C t = Angle bisector R = Circumscribed Circle Radius r = Inscribed Circle Radius

Reference - Books: 1) Max A. Sobel and Norbert Lerner. 1991. Precalculus Mathematics. Prentice Hall. 4th ed.

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