10 11 18 triangle

Obtuse scalene triangle.

Sides: a = 10   b = 11   c = 18

Area: T = 48.6599768518
Perimeter: p = 39
Semiperimeter: s = 19.5

Angle ∠ A = α = 29.44001972368° = 29°24'1″ = 0.51331302425 rad
Angle ∠ B = β = 32.68334637577° = 32°41' = 0.57704340535 rad
Angle ∠ C = γ = 117.9166339005° = 117°54'59″ = 2.05880283575 rad

Height: ha = 9.72199537036
Height: hb = 8.83663215487
Height: hc = 5.43999742798

Median: ma = 14.05334693226
Median: mb = 13.48114687627
Median: mc = 5.43113902456

Inradius: r = 2.49222958214
Circumradius: R = 10.18552336975

Vertex coordinates: A[18; 0] B[0; 0] C[8.41766666667; 5.43999742798]
Centroid: CG[8.80655555556; 1.87999914266]
Coordinates of the circumscribed circle: U[9; -4.76985412311]
Coordinates of the inscribed circle: I[8.5; 2.49222958214]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 150.6599802763° = 150°35'59″ = 0.51331302425 rad
∠ B' = β' = 147.3176536242° = 147°19' = 0.57704340535 rad
∠ C' = γ' = 62.08436609946° = 62°5'1″ = 2.05880283575 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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