# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 12   b = 14   c = 18

Area: T = 83.90547078536
Perimeter: p = 44
Semiperimeter: s = 22

Angle ∠ A = α = 41.7522205202° = 41°45'8″ = 0.72987134507 rad
Angle ∠ B = β = 50.97771974348° = 50°58'38″ = 0.89897199387 rad
Angle ∠ C = γ = 87.27105973632° = 87°16'14″ = 1.52331592642 rad

Height: ha = 13.98441179756
Height: hb = 11.98663868362
Height: hc = 9.32327453171

Median: ma = 14.96766295471
Median: mb = 13.60114705087
Median: mc = 9.43439811321

Inradius: r = 3.8143850357
Circumradius: R = 9.01102214684

Vertex coordinates: A[18; 0] B[0; 0] C[7.55655555556; 9.32327453171]
Centroid: CG[8.51985185185; 3.10875817724]
Coordinates of the circumscribed circle: U[9; 0.42990581652]
Coordinates of the inscribed circle: I[8; 3.8143850357]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 138.2487794798° = 138°14'52″ = 0.72987134507 rad
∠ B' = β' = 129.0232802565° = 129°1'22″ = 0.89897199387 rad
∠ C' = γ' = 92.72994026368° = 92°43'46″ = 1.52331592642 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 ### 6. Inradius ### 7. Circumradius ### 8. Calculation of medians #### Look also our friend's collection of math examples and problems:

See more informations about triangles or more information about solving triangles.