# 2 14 15 triangle

### Obtuse scalene triangle.

Sides: a = 2   b = 14   c = 15

Area: T = 12.52774698164
Perimeter: p = 31
Semiperimeter: s = 15.5

Angle ∠ A = α = 6.8522238335° = 6°51'8″ = 0.12195941201 rad
Angle ∠ B = β = 56.63329870308° = 56°37'59″ = 0.98884320889 rad
Angle ∠ C = γ = 116.5154774634° = 116°30'53″ = 2.03435664446 rad

Height: ha = 12.52774698164
Height: hb = 1.79896385452
Height: hc = 1.67703293088

Median: ma = 14.47441148261
Median: mb = 8.09332070281
Median: mc = 6.61443782777

Inradius: r = 0.80882238591
Circumradius: R = 8.38215807612

Vertex coordinates: A[15; 0] B[0; 0] C[1.1; 1.67703293088]
Centroid: CG[5.36766666667; 0.55767764363]
Coordinates of the circumscribed circle: U[7.5; -3.74217771256]
Coordinates of the inscribed circle: I[1.5; 0.80882238591]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 173.1487761665° = 173°8'52″ = 0.12195941201 rad
∠ B' = β' = 123.3677012969° = 123°22'1″ = 0.98884320889 rad
∠ C' = γ' = 63.48552253657° = 63°29'7″ = 2.03435664446 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.