# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 11.7   b = 6.71   c = 5.1

Area: T = 4.65990489855
Perimeter: p = 23.51
Semiperimeter: s = 11.755

Angle ∠ A = α = 164.1999311579° = 164°11'58″ = 2.86658186166 rad
Angle ∠ B = β = 8.98441085527° = 8°59'3″ = 0.15768022746 rad
Angle ∠ C = γ = 6.81765798684° = 6°49' = 0.11989717624 rad

Height: ha = 0.796641863
Height: hb = 1.38986882222
Height: hc = 1.82770780335

Median: ma = 1.13877829318
Median: mb = 8.37881844692
Median: mc = 9.19899156688

Inradius: r = 0.39663461493
Circumradius: R = 21.48443040525

Vertex coordinates: A[5.1; 0] B[0; 0] C[11.55664607843; 1.82770780335]
Centroid: CG[5.55221535948; 0.60990260112]
Coordinates of the circumscribed circle: U[2.55; 21.3322435881]
Coordinates of the inscribed circle: I[5.045; 0.39663461493]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 15.80106884211° = 15°48'2″ = 2.86658186166 rad
∠ B' = β' = 171.0165891447° = 171°57″ = 0.15768022746 rad
∠ C' = γ' = 173.1833420132° = 173°11' = 0.11989717624 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.