# 4 14 14 triangle

### Acute isosceles triangle.

Sides: a = 4   b = 14   c = 14

Area: T = 27.71328129211
Perimeter: p = 32
Semiperimeter: s = 16

Angle ∠ A = α = 16.42664214035° = 16°25'35″ = 0.28766951378 rad
Angle ∠ B = β = 81.78767892983° = 81°47'12″ = 1.42774487579 rad
Angle ∠ C = γ = 81.78767892983° = 81°47'12″ = 1.42774487579 rad

Height: ha = 13.85664064606
Height: hb = 3.95989732744
Height: hc = 3.95989732744

Median: ma = 13.85664064606
Median: mb = 7.55498344353
Median: mc = 7.55498344353

Inradius: r = 1.73220508076
Circumradius: R = 7.07325407976

Vertex coordinates: A[14; 0] B[0; 0] C[0.57114285714; 3.95989732744]
Centroid: CG[4.85771428571; 1.32196577581]
Coordinates of the circumscribed circle: U[7; 1.01103629711]
Coordinates of the inscribed circle: I[2; 1.73220508076]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 163.5743578597° = 163°34'25″ = 0.28766951378 rad
∠ B' = β' = 98.21332107017° = 98°12'48″ = 1.42774487579 rad
∠ C' = γ' = 98.21332107017° = 98°12'48″ = 1.42774487579 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.