5 20 23 triangle
Obtuse scalene triangle.
Sides: a = 5 b = 20 c = 23Area: T = 42.70883130081
Perimeter: p = 48
Semiperimeter: s = 24
Angle ∠ A = α = 10.70112654404° = 10°42'5″ = 0.18767723161 rad
Angle ∠ B = β = 47.9666483062° = 47°57'59″ = 0.837717306 rad
Angle ∠ C = γ = 121.3322251498° = 121°19'56″ = 2.11876472775 rad
Height: ha = 17.08333252033
Height: hb = 4.27108313008
Height: hc = 3.71437663485
Median: ma = 21.40767746286
Median: mb = 13.30441346957
Median: mc = 8.95882364336
Inradius: r = 1.7879513042
Circumradius: R = 13.46334210415
Vertex coordinates: A[23; 0] B[0; 0] C[3.3487826087; 3.71437663485]
Centroid: CG[8.78326086957; 1.23879221162]
Coordinates of the circumscribed circle: U[11.5; -7.00109789416]
Coordinates of the inscribed circle: I[4; 1.7879513042]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 169.299873456° = 169°17'55″ = 0.18767723161 rad
∠ B' = β' = 132.0343516938° = 132°2'1″ = 0.837717306 rad
∠ C' = γ' = 58.66877485024° = 58°40'4″ = 2.11876472775 rad
Calculate another triangle
How did we calculate this triangle?
Now we know the lengths of all three sides of the triangle and the triangle is uniquely determined. Next we calculate another its characteristics - same procedure as calculation of the triangle from the known three sides SSS.
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
