# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 7   b = 23   c = 26

Area: T = 76.68111580507
Perimeter: p = 56
Semiperimeter: s = 28

Angle ∠ A = α = 14.86600385194° = 14°51'36″ = 0.25993565991 rad
Angle ∠ B = β = 57.42110296072° = 57°25'16″ = 1.00221860265 rad
Angle ∠ C = γ = 107.7198931873° = 107°43'8″ = 1.88800500279 rad

Height: ha = 21.90989023002
Height: hb = 6.6687926787
Height: hc = 5.89985506193

Median: ma = 24.29550612265
Median: mb = 15.17439909055
Median: mc = 10.95444511501

Inradius: r = 2.73986127875
Circumradius: R = 13.64774203912

Vertex coordinates: A[26; 0] B[0; 0] C[3.76992307692; 5.89985506193]
Centroid: CG[9.92330769231; 1.96661835398]
Coordinates of the circumscribed circle: U[13; -4.15435627277]
Coordinates of the inscribed circle: I[5; 2.73986127875]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 165.1439961481° = 165°8'24″ = 0.25993565991 rad
∠ B' = β' = 122.5798970393° = 122°34'44″ = 1.00221860265 rad
∠ C' = γ' = 72.28110681266° = 72°16'52″ = 1.88800500279 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    