20 23 25 triangle
Acute scalene triangle.
Sides: a = 20 b = 23 c = 25Area: T = 217.0810630181
Perimeter: p = 68
Semiperimeter: s = 34
Angle ∠ A = α = 49.03108802499° = 49°1'51″ = 0.85657502955 rad
Angle ∠ B = β = 60.26442868924° = 60°15'51″ = 1.05218102276 rad
Angle ∠ C = γ = 70.70548328576° = 70°42'17″ = 1.23440321304 rad
Height: ha = 21.70880630182
Height: hb = 18.87765765375
Height: hc = 17.36664504145
Median: ma = 21.84403296678
Median: mb = 19.5
Median: mc = 17.55770498661
Inradius: r = 6.38547244171
Circumradius: R = 13.24439269114
Vertex coordinates: A[25; 0] B[0; 0] C[9.92; 17.36664504145]
Centroid: CG[11.64; 5.78988168048]
Coordinates of the circumscribed circle: U[12.5; 4.37662541098]
Coordinates of the inscribed circle: I[11; 6.38547244171]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 130.969911975° = 130°58'9″ = 0.85657502955 rad
∠ B' = β' = 119.7365713108° = 119°44'9″ = 1.05218102276 rad
∠ C' = γ' = 109.2955167142° = 109°17'43″ = 1.23440321304 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
