# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 1.81   b = 7.47   c = 7.25

Area: T = 6.56112432307
Perimeter: p = 16.53
Semiperimeter: s = 8.265

Angle ∠ A = α = 14.02224635239° = 14°1'21″ = 0.24547381577 rad
Angle ∠ B = β = 89.9187696642° = 89°55'4″ = 1.56993598622 rad
Angle ∠ C = γ = 76.06598398341° = 76°3'35″ = 1.32774946336 rad

Height: ha = 7.25499925201
Height: hb = 1.7576691628
Height: hc = 1.81099981326

Median: ma = 7.30549760438
Median: mb = 3.73875225752
Median: mc = 4.04994289721

Inradius: r = 0.79438588301
Circumradius: R = 3.73550038535

Vertex coordinates: A[7.25; 0] B[0; 0] C[0.00326; 1.81099981326]
Centroid: CG[2.41875333333; 0.60333327109]
Coordinates of the circumscribed circle: U[3.625; 0.9899793746]
Coordinates of the inscribed circle: I[0.795; 0.79438588301]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 165.9787536476° = 165°58'39″ = 0.24547381577 rad
∠ B' = β' = 90.0822303358° = 90°4'56″ = 1.56993598622 rad
∠ C' = γ' = 103.9440160166° = 103°56'25″ = 1.32774946336 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    