# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 11   b = 12   c = 15

Area: T = 65.23880257212
Perimeter: p = 38
Semiperimeter: s = 19

Angle ∠ A = α = 46.45877809718° = 46°27'28″ = 0.81108412411 rad
Angle ∠ B = β = 52.25769610468° = 52°15'25″ = 0.91220560274 rad
Angle ∠ C = γ = 81.28552579814° = 81°17'7″ = 1.41986953851 rad

Height: ha = 11.8611459222
Height: hb = 10.87330042869
Height: hc = 8.69884034295

Median: ma = 12.42197423484
Median: mb = 11.70546999107
Median: mc = 8.73221245983

Inradius: r = 3.43435803011
Circumradius: R = 7.58875993261

Vertex coordinates: A[15; 0] B[0; 0] C[6.73333333333; 8.69884034295]
Centroid: CG[7.24444444444; 2.89994678098]
Coordinates of the circumscribed circle: U[7.5; 1.15496362615]
Coordinates of the inscribed circle: I[7; 3.43435803011]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 133.5422219028° = 133°32'32″ = 0.81108412411 rad
∠ B' = β' = 127.7433038953° = 127°44'35″ = 0.91220560274 rad
∠ C' = γ' = 98.71547420186° = 98°42'53″ = 1.41986953851 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.