Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse scalene triangle.

Sides: a = 13   b = 16   c = 22

Area: T = 102.9498712959
Perimeter: p = 51
Semiperimeter: s = 25.5

Angle ∠ A = α = 35.79884595862° = 35°47'54″ = 0.62548009869 rad
Angle ∠ B = β = 46.04879641864° = 46°2'53″ = 0.80436885889 rad
Angle ∠ C = γ = 98.15435762274° = 98°9'13″ = 1.71331030778 rad

Height: ha = 15.83882635322
Height: hb = 12.86985891199
Height: hc = 9.35989739054

Median: ma = 18.10438669902
Median: mb = 16.2021851746
Median: mc = 9.56655632349

Inradius: r = 4.03772044298
Circumradius: R = 11.11223293057

Vertex coordinates: A[22; 0] B[0; 0] C[9.02327272727; 9.35989739054]
Centroid: CG[10.34109090909; 3.12196579685]
Coordinates of the circumscribed circle: U[11; -1.57660274736]
Coordinates of the inscribed circle: I[9.5; 4.03772044298]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 144.2021540414° = 144°12'6″ = 0.62548009869 rad
∠ B' = β' = 133.9522035814° = 133°57'7″ = 0.80436885889 rad
∠ C' = γ' = 81.84664237726° = 81°50'47″ = 1.71331030778 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     