16 21 30 triangle

Obtuse scalene triangle.

Sides: a = 16   b = 21   c = 30

Area: T = 160.1511295655
Perimeter: p = 67
Semiperimeter: s = 33.5

Angle ∠ A = α = 30.55884317859° = 30°33'30″ = 0.53333452489 rad
Angle ∠ B = β = 41.85987922056° = 41°51'32″ = 0.73105737449 rad
Angle ∠ C = γ = 107.5832776008° = 107°34'58″ = 1.87876736598 rad

Height: ha = 20.01989119569
Height: hb = 15.25325043481
Height: hc = 10.67767530437

Median: ma = 24.6277220712
Median: mb = 21.62875287539
Median: mc = 11.11330553854

Inradius: r = 4.78106356912
Circumradius: R = 15.73551209036

Vertex coordinates: A[30; 0] B[0; 0] C[11.91766666667; 10.67767530437]
Centroid: CG[13.97222222222; 3.55989176812]
Coordinates of the circumscribed circle: U[15; -4.7533317773]
Coordinates of the inscribed circle: I[12.5; 4.78106356912]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 149.4421568214° = 149°26'30″ = 0.53333452489 rad
∠ B' = β' = 138.1411207794° = 138°8'28″ = 0.73105737449 rad
∠ C' = γ' = 72.41772239916° = 72°25'2″ = 1.87876736598 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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