1.3 0.5 1.2 triangle

Right scalene triangle.

Sides: a = 1.3   b = 0.5   c = 1.2

Area: T = 0.3
Perimeter: p = 3
Semiperimeter: s = 1.5

Angle ∠ A = α = 90° = 1.57107963268 rad
Angle ∠ B = β = 22.6219864948° = 22°37'11″ = 0.39547911197 rad
Angle ∠ C = γ = 67.3880135052° = 67°22'49″ = 1.17660052071 rad

Height: ha = 0.46215384615
Height: hb = 1.2
Height: hc = 0.5

Median: ma = 0.65
Median: mb = 1.22657650672
Median: mc = 0.78110249676

Inradius: r = 0.2
Circumradius: R = 0.65

Vertex coordinates: A[1.2; 0] B[0; 0] C[1.2; 0.5]
Centroid: CG[0.8; 0.16766666667]
Coordinates of the circumscribed circle: U[0.6; 0.25]
Coordinates of the inscribed circle: I[1; 0.2]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 90° = 1.57107963268 rad
∠ B' = β' = 157.3880135052° = 157°22'49″ = 0.39547911197 rad
∠ C' = γ' = 112.6219864948° = 112°37'11″ = 1.17660052071 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     