7 21 25 triangle

Obtuse scalene triangle.

Sides: a = 7   b = 21   c = 25

Area: T = 65.29330892208
Perimeter: p = 53
Semiperimeter: s = 26.5

Angle ∠ A = α = 14.40327028211° = 14°24'10″ = 0.25113745854 rad
Angle ∠ B = β = 48.26328531992° = 48°15'46″ = 0.84223456947 rad
Angle ∠ C = γ = 117.334444398° = 117°20'4″ = 2.04878723734 rad

Height: ha = 18.65551683488
Height: hb = 6.21883894496
Height: hc = 5.22334471377

Median: ma = 22.82199474145
Median: mb = 15.05882203464
Median: mc = 9.42107218407

Inradius: r = 2.46438901593
Circumradius: R = 14.07111675763

Vertex coordinates: A[25; 0] B[0; 0] C[4.66; 5.22334471377]
Centroid: CG[9.88766666667; 1.74111490459]
Coordinates of the circumscribed circle: U[12.5; -6.46112504177]
Coordinates of the inscribed circle: I[5.5; 2.46438901593]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 165.5977297179° = 165°35'50″ = 0.25113745854 rad
∠ B' = β' = 131.7377146801° = 131°44'14″ = 0.84223456947 rad
∠ C' = γ' = 62.66655560203° = 62°39'56″ = 2.04878723734 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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