8 15 15 triangle

Acute isosceles triangle.

Sides: a = 8   b = 15   c = 15

Area: T = 57.82773291792
Perimeter: p = 38
Semiperimeter: s = 19

Angle ∠ A = α = 30.93220199068° = 30°55'55″ = 0.54398655917 rad
Angle ∠ B = β = 74.53439900466° = 74°32'2″ = 1.3010863531 rad
Angle ∠ C = γ = 74.53439900466° = 74°32'2″ = 1.3010863531 rad

Height: ha = 14.45768322948
Height: hb = 7.71103105572
Height: hc = 7.71103105572

Median: ma = 14.45768322948
Median: mb = 9.3944147114
Median: mc = 9.3944147114

Inradius: r = 3.0443543641
Circumradius: R = 7.78217877185

Vertex coordinates: A[15; 0] B[0; 0] C[2.13333333333; 7.71103105572]
Centroid: CG[5.71111111111; 2.57701035191]
Coordinates of the circumscribed circle: U[7.5; 2.07551433916]
Coordinates of the inscribed circle: I[4; 3.0443543641]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 149.0687980093° = 149°4'5″ = 0.54398655917 rad
∠ B' = β' = 105.4666009953° = 105°27'58″ = 1.3010863531 rad
∠ C' = γ' = 105.4666009953° = 105°27'58″ = 1.3010863531 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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