# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 300   b = 77.65   c = 289.78

Area: T = 11250.70884892
Perimeter: p = 667.43
Semiperimeter: s = 333.715

Angle ∠ A = α = 89.99774907302° = 89°59'51″ = 1.57107525318 rad
Angle ∠ B = β = 15.00108475213° = 15°3″ = 0.26218141798 rad
Angle ∠ C = γ = 75.00216617485° = 75°6″ = 1.3099025942 rad

Height: ha = 75.00547232614
Height: hb = 289.7879999722
Height: hc = 77.65499999255

Median: ma = 150.0033284797
Median: mb = 292.3687651383
Median: mc = 164.3832630317

Inradius: r = 33.71435234832
Circumradius: R = 1500.000000144

Vertex coordinates: A[289.78; 0] B[0; 0] C[289.7776599317; 77.65499999255]
Centroid: CG[193.1865533106; 25.88333333085]
Coordinates of the circumscribed circle: U[144.89; 38.81986545768]
Coordinates of the inscribed circle: I[256.065; 33.71435234832]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 90.00325092698° = 90°9″ = 1.57107525318 rad
∠ B' = β' = 164.9999152479° = 164°59'57″ = 0.26218141798 rad
∠ C' = γ' = 104.9988338252° = 104°59'54″ = 1.3099025942 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    