Triangle calculator SSS - result

Please enter the triangle sides:

Acute scalene triangle.

Sides: a = 16   b = 18   c = 24

Area: T = 143.9976527736
Perimeter: p = 58
Semiperimeter: s = 29

Angle ∠ A = α = 41.80990791939° = 41°48'33″ = 0.73297060892 rad
Angle ∠ B = β = 48.58988113619° = 48°35'20″ = 0.84880347379 rad
Angle ∠ C = γ = 89.60221094442° = 89°36'8″ = 1.56438518265 rad

Height: ha = 187.999565967
Height: hb = 165.9996141929
Height: hc = 121.9997106447

Median: ma = 19.64768827044
Median: mb = 18.30330052177
Median: mc = 12.08330459736

Inradius: r = 4.96553975081
Circumradius: R = 122.0002893623

Vertex coordinates: A[24; 0] B[0; 0] C[10.58333333333; 121.9997106447]
Centroid: CG[11.52877777778; 43.9999035482]
Coordinates of the circumscribed circle: U[12; 0.08333353428]
Coordinates of the inscribed circle: I[11; 4.96553975081]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 138.1910920806° = 138°11'27″ = 0.73297060892 rad
∠ B' = β' = 131.4111188638° = 131°24'40″ = 0.84880347379 rad
∠ C' = γ' = 90.39878905558° = 90°23'52″ = 1.56438518265 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     