# 16 22 28 triangle

### Obtuse scalene triangle.

Sides: a = 16   b = 22   c = 28

Area: T = 175.6565913649
Perimeter: p = 66
Semiperimeter: s = 33

Angle ∠ A = α = 34.77219440319° = 34°46'19″ = 0.60768849107 rad
Angle ∠ B = β = 51.64547342696° = 51°38'41″ = 0.90113706543 rad
Angle ∠ C = γ = 93.58333216985° = 93°35' = 1.63333370886 rad

Height: ha = 21.95769892062
Height: hb = 15.96987194227
Height: hc = 12.5476850975

Median: ma = 23.87546727726
Median: mb = 19.97549843554
Median: mc = 13.19109059583

Inradius: r = 5.32329064742
Circumradius: R = 14.02774241203

Vertex coordinates: A[28; 0] B[0; 0] C[9.92985714286; 12.5476850975]
Centroid: CG[12.64328571429; 4.18222836583]
Coordinates of the circumscribed circle: U[14; -0.87767140075]
Coordinates of the inscribed circle: I[11; 5.32329064742]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 145.2288055968° = 145°13'41″ = 0.60768849107 rad
∠ B' = β' = 128.355526573° = 128°21'19″ = 0.90113706543 rad
∠ C' = γ' = 86.41766783015° = 86°25' = 1.63333370886 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.