# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 7   b = 16   c = 20

Area: T = 50.71442731388
Perimeter: p = 43
Semiperimeter: s = 21.5

Angle ∠ A = α = 18.47994319838° = 18°28'46″ = 0.3232526932 rad
Angle ∠ B = β = 46.42664064704° = 46°25'35″ = 0.81102936528 rad
Angle ∠ C = γ = 115.0944161546° = 115°5'39″ = 2.00987720688 rad

Height: ha = 14.49897923254
Height: hb = 6.33992841424
Height: hc = 5.07114273139

Median: ma = 17.76993556439
Median: mb = 12.66988594593
Median: mc = 7.24656883731

Inradius: r = 2.35988034018
Circumradius: R = 11.04222562592

Vertex coordinates: A[20; 0] B[0; 0] C[4.825; 5.07114273139]
Centroid: CG[8.275; 1.69904757713]
Coordinates of the circumscribed circle: U[10; -4.68330997528]
Coordinates of the inscribed circle: I[5.5; 2.35988034018]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 161.5210568016° = 161°31'14″ = 0.3232526932 rad
∠ B' = β' = 133.574359353° = 133°34'25″ = 0.81102936528 rad
∠ C' = γ' = 64.90658384542° = 64°54'21″ = 2.00987720688 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 ### 6. Inradius ### 7. Circumradius ### 8. Calculation of medians #### Look also our friend's collection of math examples and problems:

See more informations about triangles or more information about solving triangles.