# 7 22 26 triangle

### Obtuse scalene triangle.

Sides: a = 7   b = 22   c = 26

Area: T = 68.1987782222
Perimeter: p = 55
Semiperimeter: s = 27.5

Angle ∠ A = α = 13.79552993996° = 13°47'43″ = 0.24107733958 rad
Angle ∠ B = β = 48.54106961042° = 48°32'27″ = 0.84771949682 rad
Angle ∠ C = γ = 117.6644004496° = 117°39'50″ = 2.05436242895 rad

Height: ha = 19.48550806349
Height: hb = 6.21997983838
Height: hc = 5.24659832478

Median: ma = 23.82875051149
Median: mb = 15.54402702679
Median: mc = 9.87442088291

Inradius: r = 2.48799193535
Circumradius: R = 14.67878966615

Vertex coordinates: A[26; 0] B[0; 0] C[4.63546153846; 5.24659832478]
Centroid: CG[10.21215384615; 1.74986610826]
Coordinates of the circumscribed circle: U[13; -6.81547377357]
Coordinates of the inscribed circle: I[5.5; 2.48799193535]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 166.20547006° = 166°12'17″ = 0.24107733958 rad
∠ B' = β' = 131.4599303896° = 131°27'33″ = 0.84771949682 rad
∠ C' = γ' = 62.33659955038° = 62°20'10″ = 2.05436242895 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.