Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse isosceles triangle.

Sides: a = 400   b = 400   c = 565.69

Area: T = 800009.9999895
Perimeter: p = 1365.69
Semiperimeter: s = 682.845

Angle ∠ A = α = 454.9995366114° = 44°59'58″ = 0.78553900757 rad
Angle ∠ B = β = 454.9995366114° = 44°59'58″ = 0.78553900757 rad
Angle ∠ C = γ = 90.00109267771° = 90°3″ = 1.57108125021 rad

Height: ha = 4009.999999948
Height: hb = 4009.999999948
Height: hc = 282.8440424931

Median: ma = 447.2166489018
Median: mb = 447.2166489018
Median: mc = 282.8440424931

Inradius: r = 117.1576895034
Circumradius: R = 282.8455000037

Vertex coordinates: A[565.69; 0] B[0; 0] C[282.845; 282.8440424931]
Centroid: CG[282.845; 94.28801416436]
Coordinates of the circumscribed circle: U[282.845; -0.00545751063]
Coordinates of the inscribed circle: I[282.845; 117.1576895034]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 1355.000463389° = 135°2″ = 0.78553900757 rad
∠ B' = β' = 1355.000463389° = 135°2″ = 0.78553900757 rad
∠ C' = γ' = 89.99990732229° = 89°59'57″ = 1.57108125021 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     