11 12 18 triangle

Obtuse scalene triangle.

Sides: a = 11   b = 12   c = 18

Area: T = 64.3310688633
Perimeter: p = 41
Semiperimeter: s = 20.5

Angle ∠ A = α = 36.55993057341° = 36°33'34″ = 0.63880802573 rad
Angle ∠ B = β = 40.5276896475° = 40°31'37″ = 0.70773277791 rad
Angle ∠ C = γ = 102.9143797791° = 102°54'50″ = 1.79661846172 rad

Height: ha = 11.69664888424
Height: hb = 10.72217814388
Height: hc = 7.14878542926

Median: ma = 14.27441024236
Median: mb = 13.65765002837
Median: mc = 7.17663500472

Inradius: r = 3.13880823723
Circumradius: R = 9.23435402064

Vertex coordinates: A[18; 0] B[0; 0] C[8.36111111111; 7.14878542926]
Centroid: CG[8.7877037037; 2.38326180975]
Coordinates of the circumscribed circle: U[9; -2.0643556334]
Coordinates of the inscribed circle: I[8.5; 3.13880823723]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 143.4410694266° = 143°26'26″ = 0.63880802573 rad
∠ B' = β' = 139.4733103525° = 139°28'23″ = 0.70773277791 rad
∠ C' = γ' = 77.08662022091° = 77°5'10″ = 1.79661846172 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.


Fatal error: Uncaught Error: Class 'TexPNG' not found in /nfsmnt/hosting1_1/1/f/1f5dde43-2431-429d-b7d6-b283e5dc0656/triangle-calculator.com/web/Calculator_Triangle.php:2346 Stack trace: #0 /nfsmnt/hosting1_1/1/f/1f5dde43-2431-429d-b7d6-b283e5dc0656/triangle-calculator.com/web/Calculator_Triangle.php(1929): Calculator_Triangle->ComputeTriangle(11, 12, 18, '<br />', true, '', Array, '<a href='/?what...', Array) #1 /nfsmnt/hosting1_1/1/f/1f5dde43-2431-429d-b7d6-b283e5dc0656/triangle-calculator.com/web/Calculators.php(1086): Calculator_Triangle->TriangleForm('Triangle calcul...') #2 /nfsmnt/hosting1_1/1/f/1f5dde43-2431-429d-b7d6-b283e5dc0656/triangle-calculator.com/web/Calculators.php(2225): Calculators->Router('triangle', 'Triangle calcul...', 'Geometry') #3 /nfsmnt/hosting1_1/1/f/1f5dde43-2431-429d-b7d6-b283e5dc0656/triangle-calculator.com/web/index_real.php(490): Calculators->Run() #4 /nfsmnt/hosting1_1/1/f/1f5dde43-2431-429d-b7d6-b283e5dc0656/triangle-calculator.com/web/index_real.php(771): HackMath->Run() #5 /nfsmnt/hos in /nfsmnt/hosting1_1/1/f/1f5dde43-2431-429d-b7d6-b283e5dc0656/triangle-calculator.com/web/Calculator_Triangle.php on line 2346