# 16 22 25 triangle

### Acute scalene triangle.

Sides: a = 16   b = 22   c = 25

Area: T = 173.6365933781
Perimeter: p = 63
Semiperimeter: s = 31.5

Angle ∠ A = α = 39.15437385766° = 39°9'13″ = 0.68333616526 rad
Angle ∠ B = β = 60.24877894243° = 60°14'52″ = 1.05215222925 rad
Angle ∠ C = γ = 80.59884719991° = 80°35'54″ = 1.40767087085 rad

Height: ha = 21.70444917226
Height: hb = 15.78550848892
Height: hc = 13.89108747025

Median: ma = 22.14772345904
Median: mb = 17.87545629317
Median: mc = 14.62201915172

Inradius: r = 5.51222518661
Circumradius: R = 12.67701884345

Vertex coordinates: A[25; 0] B[0; 0] C[7.94; 13.89108747025]
Centroid: CG[10.98; 4.63302915675]
Coordinates of the circumscribed circle: U[12.5; 2.07697040767]
Coordinates of the inscribed circle: I[9.5; 5.51222518661]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 140.8466261423° = 140°50'47″ = 0.68333616526 rad
∠ B' = β' = 119.7522210576° = 119°45'8″ = 1.05215222925 rad
∠ C' = γ' = 99.40215280009° = 99°24'6″ = 1.40767087085 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.