Triangle calculator SSS - result

Please enter the triangle sides:

Acute isosceles triangle.

Sides: a = 3.61   b = 5.1   c = 3.61

Area: T = 6.51660359115
Perimeter: p = 12.32
Semiperimeter: s = 6.16

Angle ∠ A = α = 45.06595727758° = 45°3'34″ = 0.78664379045 rad
Angle ∠ B = β = 89.88108544483° = 89°52'51″ = 1.56987168446 rad
Angle ∠ C = γ = 45.06595727758° = 45°3'34″ = 0.78664379045 rad

Height: ha = 3.61099921947
Height: hb = 2.55553082006
Height: hc = 3.61099921947

Median: ma = 4.0332744103
Median: mb = 2.55553082006
Median: mc = 4.0332744103

Inradius: r = 1.05877980376
Circumradius: R = 2.55500055134

Vertex coordinates: A[3.61; 0] B[0; 0] C[0.00875069252; 3.61099921947]
Centroid: CG[1.20658356417; 1.20333307316]
Coordinates of the circumscribed circle: U[1.805; 1.80112504319]
Coordinates of the inscribed circle: I[1.06; 1.05877980376]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 134.9440427224° = 134°56'26″ = 0.78664379045 rad
∠ B' = β' = 90.11991455517° = 90°7'9″ = 1.56987168446 rad
∠ C' = γ' = 134.9440427224° = 134°56'26″ = 0.78664379045 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     