# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 10.2   b = 15.55   c = 7.8

Area: T = 34.82328583277
Perimeter: p = 33.55
Semiperimeter: s = 16.775

Angle ∠ A = α = 35.04442031498° = 35°2'39″ = 0.61216367287 rad
Angle ∠ B = β = 118.9099298761° = 118°54'33″ = 2.07553587746 rad
Angle ∠ C = γ = 26.04664980891° = 26°2'47″ = 0.45545971503 rad

Height: ha = 6.82880114368
Height: hb = 4.47988242222
Height: hc = 8.92989380327

Median: ma = 11.19442507565
Median: mb = 4.68992829942
Median: mc = 12.55883139792

Inradius: r = 2.07658782908
Circumradius: R = 8.88217953164

Vertex coordinates: A[7.8; 0] B[0; 0] C[-4.93109294872; 8.92989380327]
Centroid: CG[0.95663568376; 2.97663126776]
Coordinates of the circumscribed circle: U[3.9; 7.98797423544]
Coordinates of the inscribed circle: I[1.225; 2.07658782908]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 144.956579685° = 144°57'21″ = 0.61216367287 rad
∠ B' = β' = 61.09107012389° = 61°5'27″ = 2.07553587746 rad
∠ C' = γ' = 153.9543501911° = 153°57'13″ = 0.45545971503 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.