# 7 14 17 triangle

### Obtuse scalene triangle.

Sides: a = 7   b = 14   c = 17

Area: T = 47.74993455453
Perimeter: p = 38
Semiperimeter: s = 19

Angle ∠ A = α = 23.65766583467° = 23°39'24″ = 0.41328865782 rad
Angle ∠ B = β = 53.37704635026° = 53°22'14″ = 0.93114903114 rad
Angle ∠ C = γ = 102.9732878151° = 102°58'22″ = 1.7977215764 rad

Height: ha = 13.64326701558
Height: hb = 6.82113350779
Height: hc = 5.61875700641

Median: ma = 15.17439909055
Median: mb = 10.95444511501
Median: mc = 7.08987234394

Inradius: r = 2.51331234498
Circumradius: R = 8.72326326402

Vertex coordinates: A[17; 0] B[0; 0] C[4.17664705882; 5.61875700641]
Centroid: CG[7.05988235294; 1.87325233547]
Coordinates of the circumscribed circle: U[8.5; -1.95881420213]
Coordinates of the inscribed circle: I[5; 2.51331234498]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 156.3433341653° = 156°20'36″ = 0.41328865782 rad
∠ B' = β' = 126.6329536497° = 126°37'46″ = 0.93114903114 rad
∠ C' = γ' = 77.02771218492° = 77°1'38″ = 1.7977215764 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.