# 14 19 28 triangle

### Obtuse scalene triangle.

Sides: a = 14   b = 19   c = 28

Area: T = 120.2854818244
Perimeter: p = 61
Semiperimeter: s = 30.5

Angle ∠ A = α = 26.88548293213° = 26°53'5″ = 0.46992287905 rad
Angle ∠ B = β = 37.85773792467° = 37°51'27″ = 0.6610735914 rad
Angle ∠ C = γ = 115.2587791432° = 115°15'28″ = 2.01216279491 rad

Height: ha = 17.18435454634
Height: hb = 12.66215598152
Height: hc = 8.59217727317

Median: ma = 22.88801223773
Median: mb = 19.99437490231
Median: mc = 9.08329510623

Inradius: r = 3.94437645326
Circumradius: R = 15.48799252905

Vertex coordinates: A[28; 0] B[0; 0] C[11.05435714286; 8.59217727317]
Centroid: CG[13.01878571429; 2.86439242439]
Coordinates of the circumscribed circle: U[14; -6.6055156092]
Coordinates of the inscribed circle: I[11.5; 3.94437645326]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 153.1155170679° = 153°6'55″ = 0.46992287905 rad
∠ B' = β' = 142.1432620753° = 142°8'33″ = 0.6610735914 rad
∠ C' = γ' = 64.7422208568° = 64°44'32″ = 2.01216279491 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.