# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 11.18   b = 5.1   c = 7.81

Area: T = 17.50554906678
Perimeter: p = 24.09
Semiperimeter: s = 12.045

Angle ∠ A = α = 118.4799442499° = 118°28'46″ = 2.06878563675 rad
Angle ∠ B = β = 23.63988068134° = 23°38'20″ = 0.41325750101 rad
Angle ∠ C = γ = 37.88217506875° = 37°52'54″ = 0.66111612759 rad

Height: ha = 3.13215725703
Height: hb = 6.86548983011
Height: hc = 4.48328401198

Median: ma = 3.50107070714
Median: mb = 9.33000940855
Median: mc = 7.76222274509

Inradius: r = 1.45333408608
Circumradius: R = 6.36595843791

Vertex coordinates: A[7.81; 0] B[0; 0] C[10.24219014085; 4.48328401198]
Centroid: CG[6.01773004695; 1.49442800399]
Coordinates of the circumscribed circle: U[3.905; 5.01994908582]
Coordinates of the inscribed circle: I[6.945; 1.45333408608]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 61.52105575008° = 61°31'14″ = 2.06878563675 rad
∠ B' = β' = 156.3611193187° = 156°21'40″ = 0.41325750101 rad
∠ C' = γ' = 142.1188249313° = 142°7'6″ = 0.66111612759 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    