7 9 9 triangle

Acute isosceles triangle.

Sides: a = 7   b = 9   c = 9

Area: T = 29.02204669156
Perimeter: p = 25
Semiperimeter: s = 12.5

Angle ∠ A = α = 45.77107609523° = 45°46'15″ = 0.79988504798 rad
Angle ∠ B = β = 67.11546195238° = 67°6'53″ = 1.17113710869 rad
Angle ∠ C = γ = 67.11546195238° = 67°6'53″ = 1.17113710869 rad

Height: ha = 8.29215619759
Height: hb = 6.44989926479
Height: hc = 6.44989926479

Median: ma = 8.29215619759
Median: mb = 6.69895440801
Median: mc = 6.69895440801

Inradius: r = 2.32216373532
Circumradius: R = 4.88444837822

Vertex coordinates: A[9; 0] B[0; 0] C[2.72222222222; 6.44989926479]
Centroid: CG[3.90774074074; 2.1549664216]
Coordinates of the circumscribed circle: U[4.5; 1.98995214708]
Coordinates of the inscribed circle: I[3.5; 2.32216373532]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 134.2299239048° = 134°13'45″ = 0.79988504798 rad
∠ B' = β' = 112.8855380476° = 112°53'7″ = 1.17113710869 rad
∠ C' = γ' = 112.8855380476° = 112°53'7″ = 1.17113710869 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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