# 14 17 26 triangle

### Obtuse scalene triangle.

Sides: a = 14   b = 17   c = 26

Area: T = 1098.999713302
Perimeter: p = 57
Semiperimeter: s = 28.5

Angle ∠ A = α = 29.55218752166° = 29°33'7″ = 0.51657775227 rad
Angle ∠ B = β = 36.79111224225° = 36°47'28″ = 0.64221262218 rad
Angle ∠ C = γ = 113.6577002361° = 113°39'25″ = 1.98436889091 rad

Height: ha = 15.57113876146
Height: hb = 12.82334956826
Height: hc = 8.3854593331

Median: ma = 20.82106628137
Median: mb = 19.07222311228
Median: mc = 8.57332140997

Inradius: r = 3.82545513439
Circumradius: R = 14.19326978809

Vertex coordinates: A[26; 0] B[0; 0] C[11.21215384615; 8.3854593331]
Centroid: CG[12.40438461538; 2.79548644437]
Coordinates of the circumscribed circle: U[13; -5.69549691077]
Coordinates of the inscribed circle: I[11.5; 3.82545513439]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 150.4488124783° = 150°26'53″ = 0.51657775227 rad
∠ B' = β' = 143.2098877577° = 143°12'32″ = 0.64221262218 rad
∠ C' = γ' = 66.34329976391° = 66°20'35″ = 1.98436889091 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.