7 16 16 triangle

Acute isosceles triangle.

Sides: a = 7   b = 16   c = 16

Area: T = 54.6443732486
Perimeter: p = 39
Semiperimeter: s = 19.5

Angle ∠ A = α = 25.2711250186° = 25°16'16″ = 0.44110665218 rad
Angle ∠ B = β = 77.3644374907° = 77°21'52″ = 1.35502630659 rad
Angle ∠ C = γ = 77.3644374907° = 77°21'52″ = 1.35502630659 rad

Height: ha = 15.6122494996
Height: hb = 6.83304665607
Height: hc = 6.83304665607

Median: ma = 15.6122494996
Median: mb = 9.40774438611
Median: mc = 9.40774438611

Vertex coordinates: A[16; 0] B[0; 0] C[1.531125; 6.83304665607]
Centroid: CG[5.844375; 2.27768221869]
Coordinates of the circumscribed circle: U[8; 1.79334353226]
Coordinates of the inscribed circle: I[3.5; 2.80222426916]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 154.7298749814° = 154°43'44″ = 0.44110665218 rad
∠ B' = β' = 102.6365625093° = 102°38'8″ = 1.35502630659 rad
∠ C' = γ' = 102.6365625093° = 102°38'8″ = 1.35502630659 rad

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. 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    