Calculations in a right triangle. Enter at a, b and c two values and choose the number of decimal places. Then click Calculate. Angles are calculated and displayed in degrees, here you can convert angle units.

Formulas:
a² + b² = c² (Pythagorean theorem)
p = a² / c
q = b² / c
h = √ p * q
Perimeter = a + b + c
A = a * b / 2
α = arccos( (b² + c² - a²) / (2bc) )
β = arccos( (a² + c² - b²) / (2ac) )
γ = π/2 = 90°
r_{c} = c / 2
r_{i} = ( a + b - c ) / 2
m_{a} = √2 * ( b² + c² ) - a² / 2
m_{b} = √2 * ( c² + a² ) - b² / 2
m_{c} = √2 * ( a² + b² ) - c² / 2

Catheti (legs), hypotenuse, median lines, heights, perimeter and radius have the same unit (e.g. meter), the area has this unit squared (e.g. square meter).

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The heights of the legs are identical with each other leg. The centroid of the right triangle is at the intersection of the median lines. The intersection of the bisecting lines is the center of the incircle. The center of the circumcircle is the intersection of the perpendicular bisectors of the legs and the center of the hypotenuse.