# 7 22 25 triangle

### Obtuse scalene triangle.

Sides: a = 7   b = 22   c = 25

Area: T = 73.48546922835
Perimeter: p = 54
Semiperimeter: s = 27

Angle ∠ A = α = 15.49987327566° = 15°29'55″ = 0.27105039165 rad
Angle ∠ B = β = 57.12216504356° = 57°7'18″ = 0.99769608743 rad
Angle ∠ C = γ = 107.3879616808° = 107°22'47″ = 1.87441278628 rad

Height: ha = 20.99656263667
Height: hb = 6.68804265712
Height: hc = 5.87987753827

Median: ma = 23.28662620444
Median: mb = 14.69769384567
Median: mc = 10.5

Inradius: r = 2.72216552698
Circumradius: R = 13.09879659857

Vertex coordinates: A[25; 0] B[0; 0] C[3.8; 5.87987753827]
Centroid: CG[9.6; 1.96595917942]
Coordinates of the circumscribed circle: U[12.5; -3.91223794503]
Coordinates of the inscribed circle: I[5; 2.72216552698]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 164.5011267243° = 164°30'5″ = 0.27105039165 rad
∠ B' = β' = 122.8788349564° = 122°52'42″ = 0.99769608743 rad
∠ C' = γ' = 72.62203831922° = 72°37'13″ = 1.87441278628 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.