Triangle calculator SSS - result

Please enter the triangle sides:

Acute scalene triangle.

Sides: a = 22   b = 23   c = 28

Area: T = 246.4377492075
Perimeter: p = 73
Semiperimeter: s = 36.5

Angle ∠ A = α = 49.9376699829° = 49°56'12″ = 0.87215598296 rad
Angle ∠ B = β = 53.14217280483° = 53°8'30″ = 0.92774981246 rad
Angle ∠ C = γ = 76.92215721227° = 76°55'18″ = 1.34325346994 rad

Height: ha = 22.40334083704
Height: hb = 21.42993471369
Height: hc = 17.60326780053

Median: ma = 23.14108729308
Median: mb = 22.43997767846
Median: mc = 17.62110101867

Inradius: r = 6.75217121116
Circumradius: R = 14.37328130415

Vertex coordinates: A[28; 0] B[0; 0] C[13.19664285714; 17.60326780053]
Centroid: CG[13.73221428571; 5.86875593351]
Coordinates of the circumscribed circle: U[14; 3.25223460341]
Coordinates of the inscribed circle: I[13.5; 6.75217121116]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 130.0633300171° = 130°3'48″ = 0.87215598296 rad
∠ B' = β' = 126.8588271952° = 126°51'30″ = 0.92774981246 rad
∠ C' = γ' = 103.0788427877° = 103°4'42″ = 1.34325346994 rad

How did we calculate this triangle?

1. The triangle circumference is the sum of the lengths of its three sides 2. Semiperimeter of the triangle 3. The triangle area using Heron's formula 4. Calculate the heights of the triangle from its area. 5. Calculation of the inner angles of the triangle using a Law of Cosines     