Triangle calculator SSS - result

Please enter the triangle sides:

Acute scalene triangle.

Sides: a = 270   b = 260   c = 109.46

Area: T = 14131.42111039
Perimeter: p = 639.46
Semiperimeter: s = 319.73

Angle ∠ A = α = 83.25987608636° = 83°15'32″ = 1.45331395082 rad
Angle ∠ B = β = 733.0001338708° = 73° = 1.27440926904 rad
Angle ∠ C = γ = 23.74111052656° = 23°44'28″ = 0.41443604549 rad

Height: ha = 104.6777193362
Height: hb = 108.7033239261
Height: hc = 258.2022468552

Median: ma = 146.8532803174
Median: mb = 159.8154723352
Median: mc = 259.3354970839

Inradius: r = 44.19879829978
Circumradius: R = 135.9439831237

Vertex coordinates: A[109.46; 0] B[0; 0] C[78.94397569889; 258.2022468552]
Centroid: CG[62.87999189963; 86.06774895175]
Coordinates of the circumscribed circle: U[54.73; 124.4365785917]
Coordinates of the inscribed circle: I[59.73; 44.19879829978]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 96.74112391364° = 96°44'28″ = 1.45331395082 rad
∠ B' = β' = 1076.999866129° = 107° = 1.27440926904 rad
∠ C' = γ' = 156.2598894734° = 156°15'32″ = 0.41443604549 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     