18 27 27 triangle

Acute isosceles triangle.

Sides: a = 18   b = 27   c = 27

Area: T = 229.1032597104
Perimeter: p = 72
Semiperimeter: s = 36

Angle ∠ A = α = 38.9422441269° = 38°56'33″ = 0.68796738189 rad
Angle ∠ B = β = 70.52987793655° = 70°31'44″ = 1.23109594173 rad
Angle ∠ C = γ = 70.52987793655° = 70°31'44″ = 1.23109594173 rad

Height: ha = 25.45658441227
Height: hb = 16.97105627485
Height: hc = 16.97105627485

Median: ma = 25.45658441227
Median: mb = 18.55439753153
Median: mc = 18.55439753153

Inradius: r = 6.36439610307
Circumradius: R = 14.3198912319

Vertex coordinates: A[27; 0] B[0; 0] C[6; 16.97105627485]
Centroid: CG[11; 5.65768542495]
Coordinates of the circumscribed circle: U[13.5; 4.7732970773]
Coordinates of the inscribed circle: I[9; 6.36439610307]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 141.0587558731° = 141°3'27″ = 0.68796738189 rad
∠ B' = β' = 109.4711220634° = 109°28'16″ = 1.23109594173 rad
∠ C' = γ' = 109.4711220634° = 109°28'16″ = 1.23109594173 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.


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