Triangle calculator SSS - result

Please enter the triangle sides:

Acute scalene triangle.

Sides: a = 5.1   b = 4.1   c = 6.37

Area: T = 10.4439950019
Perimeter: p = 15.57
Semiperimeter: s = 7.785

Angle ∠ A = α = 53.08800396154° = 53°4'48″ = 0.92664214584 rad
Angle ∠ B = β = 39.99546104766° = 39°59'41″ = 0.69880376359 rad
Angle ∠ C = γ = 86.9255349908° = 86°55'31″ = 1.51771335593 rad

Height: ha = 4.09440980467
Height: hb = 5.09326585459
Height: hc = 3.27878492995

Median: ma = 4.71107271201
Median: mb = 5.39436026921
Median: mc = 3.35664527406

Inradius: r = 1.34110340423
Circumradius: R = 3.19895914194

Vertex coordinates: A[6.37; 0] B[0; 0] C[3.90771350078; 3.27878492995]
Centroid: CG[3.42657116693; 1.09326164332]
Coordinates of the circumscribed circle: U[3.185; 0.17110801653]
Coordinates of the inscribed circle: I[3.685; 1.34110340423]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 126.9219960385° = 126°55'12″ = 0.92664214584 rad
∠ B' = β' = 140.0055389523° = 140°19″ = 0.69880376359 rad
∠ C' = γ' = 93.0754650092° = 93°4'29″ = 1.51771335593 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     