Triangle calculator SSS - result

Please enter the triangle sides:

Acute isosceles triangle.

Sides: a = 58   b = 58   c = 52.66

Area: T = 1360.711114197
Perimeter: p = 168.66
Semiperimeter: s = 84.33

Angle ∠ A = α = 63.0021606477° = 63°6″ = 1.10995854671 rad
Angle ∠ B = β = 63.0021606477° = 63°6″ = 1.10995854671 rad
Angle ∠ C = γ = 53.9976787046° = 53°59'48″ = 0.94224217195 rad

Height: ha = 46.92110738612
Height: hb = 46.92110738612
Height: hc = 51.6799116672

Median: ma = 47.19767986202
Median: mb = 47.19767986202
Median: mc = 51.6799116672

Inradius: r = 16.13655524958
Circumradius: R = 32.54769959302

Vertex coordinates: A[52.66; 0] B[0; 0] C[26.33; 51.6799116672]
Centroid: CG[26.33; 17.2266372224]
Coordinates of the circumscribed circle: U[26.33; 19.13221207418]
Coordinates of the inscribed circle: I[26.33; 16.13655524958]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 116.9988393523° = 116°59'54″ = 1.10995854671 rad
∠ B' = β' = 116.9988393523° = 116°59'54″ = 1.10995854671 rad
∠ C' = γ' = 126.0033212954° = 126°12″ = 0.94224217195 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     