# 16 19 28 triangle

### Obtuse scalene triangle.

Sides: a = 16   b = 19   c = 28

Area: T = 146.1543814524
Perimeter: p = 63
Semiperimeter: s = 31.5

Angle ∠ A = α = 33.32993183747° = 33°19'46″ = 0.58217063431 rad
Angle ∠ B = β = 40.72882696126° = 40°43'42″ = 0.71108424034 rad
Angle ∠ C = γ = 105.9422412013° = 105°56'33″ = 1.84990439071 rad

Height: ha = 18.26992268155
Height: hb = 15.38546120552
Height: hc = 10.44395581803

Median: ma = 22.55499445676
Median: mb = 20.73304124416
Median: mc = 10.60766017178

Inradius: r = 4.64398036357
Circumradius: R = 14.5660003151

Vertex coordinates: A[28; 0] B[0; 0] C[12.125; 10.44395581803]
Centroid: CG[13.375; 3.48798527268]
Coordinates of the circumscribed circle: U[14; -3.99992113918]
Coordinates of the inscribed circle: I[12.5; 4.64398036357]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 146.6710681625° = 146°40'14″ = 0.58217063431 rad
∠ B' = β' = 139.2721730387° = 139°16'18″ = 0.71108424034 rad
∠ C' = γ' = 74.05875879874° = 74°3'27″ = 1.84990439071 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 ### 6. Inradius ### 7. Circumradius ### 8. Calculation of medians #### Look also our friend's collection of math examples and problems:

See more informations about triangles or more information about solving triangles.