# 5 22 25 triangle

### Obtuse scalene triangle.

Sides: a = 5   b = 22   c = 25

Area: T = 46.73332857822
Perimeter: p = 52
Semiperimeter: s = 26

Angle ∠ A = α = 9.78442852588° = 9°47'3″ = 0.17107679927 rad
Angle ∠ B = β = 48.39443462161° = 48°23'40″ = 0.84546406808 rad
Angle ∠ C = γ = 121.8211368525° = 121°49'17″ = 2.126618398 rad

Height: ha = 18.69333143129
Height: hb = 4.24884805257
Height: hc = 3.73986628626

Median: ma = 23.41547389479
Median: mb = 14.28328568571
Median: mc = 9.91221138008

Inradius: r = 1.79774340685
Circumradius: R = 14.71111419301

Vertex coordinates: A[25; 0] B[0; 0] C[3.32; 3.73986628626]
Centroid: CG[9.44; 1.24662209542]
Coordinates of the circumscribed circle: U[12.5; -7.75767839268]
Coordinates of the inscribed circle: I[4; 1.79774340685]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 170.2165714741° = 170°12'57″ = 0.17107679927 rad
∠ B' = β' = 131.6065653784° = 131°36'20″ = 0.84546406808 rad
∠ C' = γ' = 58.17986314749° = 58°10'43″ = 2.126618398 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.