Triangle calculator

Please enter what you know about the triangle:
You have entered side a, b and c.

Obtuse scalene triangle.

Sides: a = 14.9   b = 23.8   c = 36.9

Area: T = 104.4365683557
Perimeter: p = 75.6
Semiperimeter: s = 37.8

Angle ∠ A = α = 13.75987896448° = 13°45'32″ = 0.24401361804 rad
Angle ∠ B = β = 22.32773250026° = 22°19'38″ = 0.39896853345 rad
Angle ∠ C = γ = 143.9143885353° = 143°54'50″ = 2.51217711387 rad

Height: ha = 14.0188212558
Height: hb = 8.77661078619
Height: hc = 5.66604706535

Median: ma = 30.14217069855
Median: mb = 25.4999019589
Median: mc = 7.33663819421

Inradius: r = 2.76328487713
Circumradius: R = 31.32442503767

Vertex coordinates: A[36.9; 0] B[0; 0] C[13.78329268293; 5.66604706535]
Centroid: CG[16.89443089431; 1.88768235512]
Coordinates of the circumscribed circle: U[18.45; -25.31441494359]
Coordinates of the inscribed circle: I[14; 2.76328487713]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 166.2411210355° = 166°14'28″ = 0.24401361804 rad
∠ B' = β' = 157.6732674997° = 157°40'22″ = 0.39896853345 rad
∠ C' = γ' = 36.08661146473° = 36°5'10″ = 2.51217711387 rad

How did we calculate this triangle?

1. Input data entered: side a, b and c. 2. The triangle circumference is the sum of the lengths of its three sides 3. Semiperimeter of the triangle 4. The triangle area using Heron's formula 5. Calculate the heights of the triangle from its area. 6. Calculation of the inner angles of the triangle using a Law of Cosines     