# 11 11 14 triangle

### Acute isosceles triangle.

Sides: a = 11   b = 11   c = 14

Area: T = 59.39769696197
Perimeter: p = 36
Semiperimeter: s = 18

Angle ∠ A = α = 50.47988036414° = 50°28'44″ = 0.8811021326 rad
Angle ∠ B = β = 50.47988036414° = 50°28'44″ = 0.8811021326 rad
Angle ∠ C = γ = 79.04223927173° = 79°2'33″ = 1.38795500016 rad

Height: ha = 10.79994490218
Height: hb = 10.79994490218
Height: hc = 8.48552813742

Median: ma = 11.32547516529
Median: mb = 11.32547516529
Median: mc = 8.48552813742

Inradius: r = 3.32998316455
Circumradius: R = 7.1329993377

Vertex coordinates: A[14; 0] B[0; 0] C[7; 8.48552813742]
Centroid: CG[7; 2.82884271247]
Coordinates of the circumscribed circle: U[7; 1.35552879973]
Coordinates of the inscribed circle: I[7; 3.32998316455]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 129.5211196359° = 129°31'16″ = 0.8811021326 rad
∠ B' = β' = 129.5211196359° = 129°31'16″ = 0.8811021326 rad
∠ C' = γ' = 100.9587607283° = 100°57'27″ = 1.38795500016 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.