# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 300   b = 400   c = 283.36

Area: T = 42426.03661391
Perimeter: p = 983.36
Semiperimeter: s = 491.68

Angle ∠ A = α = 48.47113503369° = 48°28'17″ = 0.84659846563 rad
Angle ∠ B = β = 86.52991503251° = 86°31'45″ = 1.51102185721 rad
Angle ∠ C = γ = 44.9999499338° = 44°59'58″ = 0.78553894252 rad

Height: ha = 282.8440240928
Height: hb = 212.1330180696
Height: hc = 299.4549718656

Median: ma = 312.4844311286
Median: mb = 212.4776927689
Median: mc = 323.92440306

Inradius: r = 86.28879029839
Circumradius: R = 200.3687528376

Vertex coordinates: A[283.36; 0] B[0; 0] C[18.16222134387; 299.4549718656]
Centroid: CG[100.507740448; 99.81765728852]
Coordinates of the circumscribed circle: U[141.68; 141.6822476078]
Coordinates of the inscribed circle: I[91.68; 86.28879029839]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 131.5298649663° = 131°31'43″ = 0.84659846563 rad
∠ B' = β' = 93.47108496749° = 93°28'15″ = 1.51102185721 rad
∠ C' = γ' = 135.0010500662° = 135°2″ = 0.78553894252 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    