# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 9   b = 16   c = 23

Area: T = 53.666563146
Perimeter: p = 48
Semiperimeter: s = 24

Angle ∠ A = α = 16.95774262942° = 16°57'27″ = 0.29659629215 rad
Angle ∠ B = β = 31.232225881° = 31°13'56″ = 0.54551057491 rad
Angle ∠ C = γ = 131.8110314896° = 131°48'37″ = 2.3010523983 rad

Height: ha = 11.926569588
Height: hb = 6.70882039325
Height: hc = 4.66765766487

Median: ma = 19.29437813816
Median: mb = 15.52441746963
Median: mc = 6.02107972894

Inradius: r = 2.23660679775
Circumradius: R = 15.42988690447

Vertex coordinates: A[23; 0] B[0; 0] C[7.69656521739; 4.66765766487]
Centroid: CG[10.2321884058; 1.55655255496]
Coordinates of the circumscribed circle: U[11.5; -10.28659126965]
Coordinates of the inscribed circle: I[8; 2.23660679775]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 163.0432573706° = 163°2'33″ = 0.29659629215 rad
∠ B' = β' = 148.768774119° = 148°46'4″ = 0.54551057491 rad
∠ C' = γ' = 48.19896851042° = 48°11'23″ = 2.3010523983 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   