21 26 26 triangle

Acute isosceles triangle.

Sides: a = 21   b = 26   c = 26

Area: T = 249.7487747738
Perimeter: p = 73
Semiperimeter: s = 36.5

Angle ∠ A = α = 47.63876827869° = 47°38'16″ = 0.83114344127 rad
Angle ∠ B = β = 66.18111586065° = 66°10'52″ = 1.15550791205 rad
Angle ∠ C = γ = 66.18111586065° = 66°10'52″ = 1.15550791205 rad

Height: ha = 23.78554997845
Height: hb = 19.21113652106
Height: hc = 19.21113652106

Median: ma = 23.78554997845
Median: mb = 19.7365754356
Median: mc = 19.7365754356

Inradius: r = 6.84224040476
Circumradius: R = 14.211033836

Vertex coordinates: A[26; 0] B[0; 0] C[8.48107692308; 19.21113652106]
Centroid: CG[11.49435897436; 6.40437884035]
Coordinates of the circumscribed circle: U[13; 5.73987904915]
Coordinates of the inscribed circle: I[10.5; 6.84224040476]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 132.3622317213° = 132°21'44″ = 0.83114344127 rad
∠ B' = β' = 113.8198841393° = 113°49'8″ = 1.15550791205 rad
∠ C' = γ' = 113.8198841393° = 113°49'8″ = 1.15550791205 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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