# 7 14 19 triangle

### Obtuse scalene triangle.

Sides: a = 7   b = 14   c = 19

Area: T = 39.49768353163
Perimeter: p = 40
Semiperimeter: s = 20

Angle ∠ A = α = 17.27656260544° = 17°16'32″ = 0.3021516555 rad
Angle ∠ B = β = 36.43769168605° = 36°26'13″ = 0.63659441685 rad
Angle ∠ C = γ = 126.2877457085° = 126°17'15″ = 2.20441319301 rad

Height: ha = 11.28548100904
Height: hb = 5.64224050452
Height: hc = 4.15875616122

Median: ma = 16.31771688721
Median: mb = 12.49899959968
Median: mc = 5.67989083458

Inradius: r = 1.97548417658
Circumradius: R = 11.78657543844

Vertex coordinates: A[19; 0] B[0; 0] C[5.63215789474; 4.15875616122]
Centroid: CG[8.21105263158; 1.38658538707]
Coordinates of the circumscribed circle: U[9.5; -6.97552423908]
Coordinates of the inscribed circle: I[6; 1.97548417658]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 162.7244373946° = 162°43'28″ = 0.3021516555 rad
∠ B' = β' = 143.5633083139° = 143°33'47″ = 0.63659441685 rad
∠ C' = γ' = 53.71325429149° = 53°42'45″ = 2.20441319301 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.