8 12 12 triangle

Acute isosceles triangle.

Sides: a = 8   b = 12   c = 12

Area: T = 45.25548339959
Perimeter: p = 32
Semiperimeter: s = 16

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 = 11.3143708499
Height: hb = 7.54224723327
Height: hc = 7.54224723327

Median: ma = 11.3143708499
Median: mb = 8.24662112512
Median: mc = 8.24662112512

Inradius: r = 2.82884271247
Circumradius: R = 6.36439610307

Vertex coordinates: A[12; 0] B[0; 0] C[2.66766666667; 7.54224723327]
Centroid: CG[4.88988888889; 2.51441574442]
Coordinates of the circumscribed circle: U[6; 2.12113203436]
Coordinates of the inscribed circle: I[4; 2.82884271247]

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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