7 12 14 triangle
Obtuse scalene triangle.
Sides: a = 7 b = 12 c = 14Area: T = 41.99333030375
Perimeter: p = 33
Semiperimeter: s = 16.5
Angle ∠ A = α = 29.99547255274° = 29°59'41″ = 0.52435067187 rad
Angle ∠ B = β = 58.98220811689° = 58°58'55″ = 1.02994315161 rad
Angle ∠ C = γ = 91.02331933037° = 91°1'23″ = 1.58986544188 rad
Height: ha = 11.99880865821
Height: hb = 6.99988838396
Height: hc = 5.99990432911
Median: ma = 12.56598566871
Median: mb = 9.30105376189
Median: mc = 6.8922024376
Inradius: r = 2.54550486689
Circumradius: R = 7.00111163384
Vertex coordinates: A[14; 0] B[0; 0] C[3.60771428571; 5.99990432911]
Centroid: CG[5.8699047619; 21.999681097]
Coordinates of the circumscribed circle: U[7; -0.12550199346]
Coordinates of the inscribed circle: I[4.5; 2.54550486689]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 150.0055274473° = 150°19″ = 0.52435067187 rad
∠ B' = β' = 121.0187918831° = 121°1'5″ = 1.02994315161 rad
∠ C' = γ' = 88.97768066963° = 88°58'37″ = 1.58986544188 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
