Isosceles triangle calculator (c)
Acute isosceles triangle.
Sides: a = 5.35991000926 b = 5.35991000926 c = 6.3Area: T = 13.65771496059
Perimeter: p = 17.01882001852
Semiperimeter: s = 8.50991000926
Angle ∠ A = α = 54° = 0.94224777961 rad
Angle ∠ B = β = 54° = 0.94224777961 rad
Angle ∠ C = γ = 72° = 1.25766370614 rad
Height: ha = 5.09768070646
Height: hb = 5.09768070646
Height: hc = 4.33656030495
Median: ma = 5.19985563814
Median: mb = 5.19985563814
Median: mc = 4.33656030495
Inradius: r = 1.60550051659
Circumradius: R = 3.31221060064
Vertex coordinates: A[6.3; 0] B[0; 0] C[3.15; 4.33656030495]
Centroid: CG[3.15; 1.44552010165]
Coordinates of the circumscribed circle: U[3.15; 1.02334970431]
Coordinates of the inscribed circle: I[3.15; 1.60550051659]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 126° = 0.94224777961 rad
∠ B' = β' = 126° = 0.94224777961 rad
∠ C' = γ' = 108° = 1.25766370614 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
