# 9 14 14 triangle

### Acute isosceles triangle.

Sides: a = 9   b = 14   c = 14

Area: T = 59.6576831126
Perimeter: p = 37
Semiperimeter: s = 18.5

Angle ∠ A = α = 37.4998681694° = 37°29'55″ = 0.65444754607 rad
Angle ∠ B = β = 71.2510659153° = 71°15'2″ = 1.24435585964 rad
Angle ∠ C = γ = 71.2510659153° = 71°15'2″ = 1.24435585964 rad

Height: ha = 13.25770735836
Height: hb = 8.52224044466
Height: hc = 8.52224044466

Median: ma = 13.25770735836
Median: mb = 9.46604439642
Median: mc = 9.46604439642

Inradius: r = 3.22546935744
Circumradius: R = 7.39222800068

Vertex coordinates: A[14; 0] B[0; 0] C[2.89328571429; 8.52224044466]
Centroid: CG[5.6310952381; 2.84108014822]
Coordinates of the circumscribed circle: U[7; 2.37660900022]
Coordinates of the inscribed circle: I[4.5; 3.22546935744]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 142.5011318306° = 142°30'5″ = 0.65444754607 rad
∠ B' = β' = 108.7499340847° = 108°44'58″ = 1.24435585964 rad
∠ C' = γ' = 108.7499340847° = 108°44'58″ = 1.24435585964 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.