# 14 26 30 triangle

### Obtuse scalene triangle.

Sides: a = 14   b = 26   c = 30

Area: T = 181.8655334795
Perimeter: p = 70
Semiperimeter: s = 35

Angle ∠ A = α = 27.7965772496° = 27°47'45″ = 0.48551277482 rad
Angle ∠ B = β = 60° = 1.04771975512 rad
Angle ∠ C = γ = 92.2044227504° = 92°12'15″ = 1.60992673542 rad

Height: ha = 25.98107621135
Height: hb = 13.99896411381
Height: hc = 12.1244355653

Median: ma = 27.18545544381
Median: mb = 19.46879223339
Median: mc = 14.52658390463

Inradius: r = 5.19661524227
Circumradius: R = 15.01111069989

Vertex coordinates: A[30; 0] B[0; 0] C[7; 12.1244355653]
Centroid: CG[12.33333333333; 4.04114518843]
Coordinates of the circumscribed circle: U[15; -0.57773502692]
Coordinates of the inscribed circle: I[9; 5.19661524227]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 152.2044227504° = 152°12'15″ = 0.48551277482 rad
∠ B' = β' = 120° = 1.04771975512 rad
∠ C' = γ' = 87.7965772496° = 87°47'45″ = 1.60992673542 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.