# 19 25 26 triangle

### Acute scalene triangle.

Sides: a = 19   b = 25   c = 26

Area: T = 224.4999443206
Perimeter: p = 70
Semiperimeter: s = 35

Angle ∠ A = α = 43.69108952793° = 43°41'27″ = 0.76325499758 rad
Angle ∠ B = β = 65.35444154842° = 65°21'16″ = 1.14106497309 rad
Angle ∠ C = γ = 70.95546892365° = 70°57'17″ = 1.23883929469 rad

Height: ha = 23.63215203375
Height: hb = 17.96599554565
Height: hc = 17.2699187939

Median: ma = 23.67696007571
Median: mb = 19.03328663107
Median: mc = 18

Inradius: r = 6.41442698059
Circumradius: R = 13.75328180734

Vertex coordinates: A[26; 0] B[0; 0] C[7.92330769231; 17.2699187939]
Centroid: CG[11.30876923077; 5.75663959797]
Coordinates of the circumscribed circle: U[13; 4.48877616871]
Coordinates of the inscribed circle: I[10; 6.41442698059]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 136.3099104721° = 136°18'33″ = 0.76325499758 rad
∠ B' = β' = 114.6465584516° = 114°38'44″ = 1.14106497309 rad
∠ C' = γ' = 109.0455310763° = 109°2'43″ = 1.23883929469 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.