# 22 25 26 triangle

### Acute scalene triangle.

Sides: a = 22   b = 25   c = 26

Area: T = 252.7988214986
Perimeter: p = 73
Semiperimeter: s = 36.5

Angle ∠ A = α = 51.06332913786° = 51°3'48″ = 0.89112225615 rad
Angle ∠ B = β = 62.11876632793° = 62°7'4″ = 1.08441577479 rad
Angle ∠ C = γ = 66.81990453421° = 66°49'9″ = 1.16662123443 rad

Height: ha = 22.98216559078
Height: hb = 20.22438571989
Height: hc = 19.44660165374

Median: ma = 23.0110866998
Median: mb = 20.58551888502
Median: mc = 19.63441539161

Inradius: r = 6.92659784928
Circumradius: R = 14.14217137783

Vertex coordinates: A[26; 0] B[0; 0] C[10.28884615385; 19.44660165374]
Centroid: CG[12.09661538462; 6.48220055125]
Coordinates of the circumscribed circle: U[13; 5.56766927873]
Coordinates of the inscribed circle: I[11.5; 6.92659784928]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 128.9376708621° = 128°56'12″ = 0.89112225615 rad
∠ B' = β' = 117.8822336721° = 117°52'56″ = 1.08441577479 rad
∠ C' = γ' = 113.1810954658° = 113°10'51″ = 1.16662123443 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.