17 17 27 triangle
Obtuse isosceles triangle.
Sides: a = 17 b = 17 c = 27Area: T = 139.4821853659
Perimeter: p = 61
Semiperimeter: s = 30.5
Angle ∠ A = α = 37.4288005543° = 37°25'41″ = 0.65332419292 rad
Angle ∠ B = β = 37.4288005543° = 37°25'41″ = 0.65332419292 rad
Angle ∠ C = γ = 105.1443988914° = 105°8'38″ = 1.83551087952 rad
Height: ha = 16.41096298422
Height: hb = 16.41096298422
Height: hc = 10.33219891599
Median: ma = 20.8998564544
Median: mb = 20.8998564544
Median: mc = 10.33219891599
Inradius: r = 4.57331755298
Circumradius: R = 13.98656902445
Vertex coordinates: A[27; 0] B[0; 0] C[13.5; 10.33219891599]
Centroid: CG[13.5; 3.44439963866]
Coordinates of the circumscribed circle: U[13.5; -3.65437010846]
Coordinates of the inscribed circle: I[13.5; 4.57331755298]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 142.5721994457° = 142°34'19″ = 0.65332419292 rad
∠ B' = β' = 142.5721994457° = 142°34'19″ = 0.65332419292 rad
∠ C' = γ' = 74.85660110861° = 74°51'22″ = 1.83551087952 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
