Triangle calculator SSS - result

Please enter the triangle sides:

Acute scalene triangle.

Sides: a = 24   b = 25   c = 28

Area: T = 281.3043994817
Perimeter: p = 77
Semiperimeter: s = 38.5

Angle ∠ A = α = 53.48773679008° = 53°29'15″ = 0.93435306781 rad
Angle ∠ B = β = 56.84771120714° = 56°50'50″ = 0.99221692759 rad
Angle ∠ C = γ = 69.66655200278° = 69°39'56″ = 1.21658926996 rad

Height: ha = 23.44219995681
Height: hb = 22.50443195854
Height: hc = 20.09331424869

Median: ma = 23.67548812035
Median: mb = 22.88655849827
Median: mc = 20.11221853611

Inradius: r = 7.3076597268
Circumradius: R = 14.93304669588

Vertex coordinates: A[28; 0] B[0; 0] C[13.125; 20.09331424869]
Centroid: CG[13.70883333333; 6.69877141623]
Coordinates of the circumscribed circle: U[14; 5.18883372682]
Coordinates of the inscribed circle: I[13.5; 7.3076597268]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 126.5132632099° = 126°30'45″ = 0.93435306781 rad
∠ B' = β' = 123.1532887929° = 123°9'10″ = 0.99221692759 rad
∠ C' = γ' = 110.3344479972° = 110°20'4″ = 1.21658926996 rad

How did we calculate this triangle?

1. The triangle circumference is the sum of the lengths of its three sides 2. Semiperimeter of the triangle 3. The triangle area using Heron's formula 4. Calculate the heights of the triangle from its area. 5. Calculation of the inner angles of the triangle using a Law of Cosines     