Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse scalene triangle.

Sides: a = 29.88   b = 413.74   c = 405

Area: T = 5844.606592414
Perimeter: p = 848.62
Semiperimeter: s = 424.31

Angle ∠ A = α = 44.0001676997° = 4°1″ = 0.0769816097 rad
Angle ∠ B = β = 104.9977126703° = 104°59'50″ = 1.83325455661 rad
Angle ∠ C = γ = 71.00327055972° = 71°10″ = 1.23992309905 rad

Height: ha = 391.2055215806
Height: hb = 28.25325543778
Height: hc = 28.86222514772

Median: ma = 409.1210630377
Median: mb = 199.158750124
Median: mc = 212.2044031536

Inradius: r = 13.77443770454
Circumradius: R = 214.1654705927

Vertex coordinates: A[405; 0] B[0; 0] C[-7.7322065679; 28.86222514772]
Centroid: CG[132.4232644774; 9.62107504924]
Coordinates of the circumscribed circle: U[202.5; 69.71656457661]
Coordinates of the inscribed circle: I[10.57; 13.77443770454]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 1765.9998323° = 175°59'59″ = 0.0769816097 rad
∠ B' = β' = 75.00328732969° = 75°10″ = 1.83325455661 rad
∠ C' = γ' = 108.9977294403° = 108°59'50″ = 1.23992309905 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     