# 36 36 36 triangle

### Equilateral triangle.

Sides: a = 36   b = 36   c = 36

Area: T = 561.1844461652
Perimeter: p = 108
Semiperimeter: s = 54

Angle ∠ A = α = 60° = 1.04771975512 rad
Angle ∠ B = β = 60° = 1.04771975512 rad
Angle ∠ C = γ = 60° = 1.04771975512 rad

Height: ha = 31.17769145362
Height: hb = 31.17769145362
Height: hc = 31.17769145362

Median: ma = 31.17769145362
Median: mb = 31.17769145362
Median: mc = 31.17769145362

Inradius: r = 10.39223048454
Circumradius: R = 20.78546096908

Vertex coordinates: A[36; 0] B[0; 0] C[18; 31.17769145362]
Centroid: CG[18; 10.39223048454]
Coordinates of the circumscribed circle: U[18; 10.39223048454]
Coordinates of the inscribed circle: I[18; 10.39223048454]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 120° = 1.04771975512 rad
∠ B' = β' = 120° = 1.04771975512 rad
∠ C' = γ' = 120° = 1.04771975512 rad

# How did we calculate this triangle?

### 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.