# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 19   b = 26   c = 30

Area: T = 244.614385386
Perimeter: p = 75
Semiperimeter: s = 37.5

Angle ∠ A = α = 38.84549485964° = 38°50'42″ = 0.67879722508 rad
Angle ∠ B = β = 59.12655945924° = 59°7'32″ = 1.03219362978 rad
Angle ∠ C = γ = 82.02994568112° = 82°1'46″ = 1.4321684105 rad

Height: ha = 25.74988267221
Height: hb = 18.81664502969
Height: hc = 16.30875902573

Median: ma = 26.41549578837
Median: mb = 21.48325510589
Median: mc = 17.1321841699

Inradius: r = 6.52330361029
Circumradius: R = 15.14663211978

Vertex coordinates: A[30; 0] B[0; 0] C[9.75; 16.30875902573]
Centroid: CG[13.25; 5.43658634191]
Coordinates of the circumscribed circle: U[15; 2.1100248992]
Coordinates of the inscribed circle: I[11.5; 6.52330361029]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 141.1555051404° = 141°9'18″ = 0.67879722508 rad
∠ B' = β' = 120.8744405408° = 120°52'28″ = 1.03219362978 rad
∠ C' = γ' = 97.97105431888° = 97°58'14″ = 1.4321684105 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    