Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse isosceles triangle.

Sides: a = 110   b = 77.78   c = 77.78

Area: T = 3024.864419695
Perimeter: p = 265.56
Semiperimeter: s = 132.78

Angle ∠ A = α = 90.00325722698° = 90°9″ = 1.57108412214 rad
Angle ∠ B = β = 44.99987138651° = 44°59'55″ = 0.78553757161 rad
Angle ∠ C = γ = 44.99987138651° = 44°59'55″ = 0.78553757161 rad

Height: ha = 54.99875308537
Height: hb = 77.78799999216
Height: hc = 77.78799999216

Median: ma = 54.99875308537
Median: mb = 86.96222452562
Median: mc = 86.96222452562

Inradius: r = 22.78110227214
Circumradius: R = 555.0000000554

Vertex coordinates: A[77.78; 0] B[0; 0] C[77.78334919002; 77.78799999216]
Centroid: CG[51.85444973001; 25.92766666405]
Coordinates of the circumscribed circle: U[38.89; 38.89217459893]
Coordinates of the inscribed circle: I[55; 22.78110227214]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 89.99774277302° = 89°59'51″ = 1.57108412214 rad
∠ B' = β' = 135.0011286135° = 135°5″ = 0.78553757161 rad
∠ C' = γ' = 135.0011286135° = 135°5″ = 0.78553757161 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     