Triangle calculator

Please enter what you know about the triangle:
You have entered side a, b and c.

Acute isosceles triangle.

Sides: a = 1.85   b = 1.85   c = 1.9

Area: T = 1.50880782473
Perimeter: p = 5.6
Semiperimeter: s = 2.8

Angle ∠ A = α = 59.10218521748° = 59°6'7″ = 1.03215219145 rad
Angle ∠ B = β = 59.10218521748° = 59°6'7″ = 1.03215219145 rad
Angle ∠ C = γ = 61.79662956505° = 61°47'47″ = 1.07985488246 rad

Height: ha = 1.6330354862
Height: hb = 1.6330354862
Height: hc = 1.58774507866

Median: ma = 1.63111422378
Median: mb = 1.63111422378
Median: mc = 1.58774507866

Inradius: r = 0.5398599374
Circumradius: R = 1.07879861741

Vertex coordinates: A[1.9; 0] B[0; 0] C[0.95; 1.58774507866]
Centroid: CG[0.95; 0.52991502622]
Coordinates of the circumscribed circle: U[0.95; 0.50994646126]
Coordinates of the inscribed circle: I[0.95; 0.5398599374]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 120.8988147825° = 120°53'53″ = 1.03215219145 rad
∠ B' = β' = 120.8988147825° = 120°53'53″ = 1.03215219145 rad
∠ C' = γ' = 118.204370435° = 118°12'13″ = 1.07985488246 rad

How did we calculate this triangle?

1. Input data entered: side a, b and c. 2. The triangle circumference is the sum of the lengths of its three sides 3. Semiperimeter of the triangle 4. The triangle area using Heron's formula 5. Calculate the heights of the triangle from its area. 6. Calculation of the inner angles of the triangle using a Law of Cosines     