# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 45   b = 70.35   c = 99

Area: T = 1416.348776472
Perimeter: p = 214.35
Semiperimeter: s = 107.175

Angle ∠ A = α = 23.99992540859° = 23°59'57″ = 0.41988660018 rad
Angle ∠ B = β = 39.48327856356° = 39°28'58″ = 0.68991046072 rad
Angle ∠ C = γ = 116.5187960278° = 116°31'5″ = 2.03436220446 rad

Height: ha = 62.94987895431
Height: hb = 40.26657502408
Height: hc = 28.61330861559

Median: ma = 82.87882917898
Median: mb = 68.37992320445
Median: mc = 32.21995535683

Inradius: r = 13.21552812197
Circumradius: R = 55.32199676321

Vertex coordinates: A[99; 0] B[0; 0] C[34.73217045455; 28.61330861559]
Centroid: CG[44.57772348485; 9.53876953853]
Coordinates of the circumscribed circle: U[49.5; -24.69991663587]
Coordinates of the inscribed circle: I[36.825; 13.21552812197]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 156.0010745914° = 156°3″ = 0.41988660018 rad
∠ B' = β' = 140.5177214364° = 140°31'2″ = 0.68991046072 rad
∠ C' = γ' = 63.48220397215° = 63°28'55″ = 2.03436220446 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    