12 17 28 triangle

Obtuse scalene triangle.

Sides: a = 12   b = 17   c = 28

Area: T = 51.9999399035
Perimeter: p = 57
Semiperimeter: s = 28.5

Angle ∠ A = α = 12.62200576915° = 12°37'12″ = 0.22202615585 rad
Angle ∠ B = β = 18.03303198517° = 18°1'49″ = 0.31546884466 rad
Angle ∠ C = γ = 149.3549622457° = 149°20'59″ = 2.60766426485 rad

Height: ha = 8.66765665058
Height: hb = 6.11875763571
Height: hc = 3.71442427882

Median: ma = 22.37218573212
Median: mb = 19.79326754129
Median: mc = 4.52876925691

Inradius: r = 1.8254540317
Circumradius: R = 27.46218558387

Vertex coordinates: A[28; 0] B[0; 0] C[11.41107142857; 3.71442427882]
Centroid: CG[13.13769047619; 1.23880809294]
Coordinates of the circumscribed circle: U[14; -23.62552730377]
Coordinates of the inscribed circle: I[11.5; 1.8254540317]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 167.3879942308° = 167°22'48″ = 0.22202615585 rad
∠ B' = β' = 161.9769680148° = 161°58'11″ = 0.31546884466 rad
∠ C' = γ' = 30.65503775432° = 30°39'1″ = 2.60766426485 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(12, 17, 28, '<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