# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 5.1   b = 4.47   c = 3.16

Area: T = 6.99329929568
Perimeter: p = 12.73
Semiperimeter: s = 6.365

Angle ∠ A = α = 81.94991959775° = 81°56'57″ = 1.43302832892 rad
Angle ∠ B = β = 60.20877116627° = 60°12'28″ = 1.05108228036 rad
Angle ∠ C = γ = 37.84330923598° = 37°50'35″ = 0.66604865608 rad

Height: ha = 2.74223501792
Height: hb = 3.12988559091
Height: hc = 4.42659449094

Median: ma = 2.91221727284
Median: mb = 3.6065908346
Median: mc = 4.52875876579

Inradius: r = 1.09986634653
Circumradius: R = 2.57553822592

Vertex coordinates: A[3.16; 0] B[0; 0] C[2.5343971519; 4.42659449094]
Centroid: CG[1.89879905063; 1.47553149698]
Coordinates of the circumscribed circle: U[1.58; 2.03437634526]
Coordinates of the inscribed circle: I[1.895; 1.09986634653]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 98.05108040225° = 98°3'3″ = 1.43302832892 rad
∠ B' = β' = 119.7922288337° = 119°47'32″ = 1.05108228036 rad
∠ C' = γ' = 142.157690764° = 142°9'25″ = 0.66604865608 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    