# 33 33 33 triangle

### Equilateral triangle.

Sides: a = 33   b = 33   c = 33

Area: T = 471.5510832361
Perimeter: p = 99
Semiperimeter: s = 49.5

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

Height: ha = 28.57988383249
Height: hb = 28.57988383249
Height: hc = 28.57988383249

Median: ma = 28.57988383249
Median: mb = 28.57988383249
Median: mc = 28.57988383249

Inradius: r = 9.52662794416
Circumradius: R = 19.05325588833

Vertex coordinates: A[33; 0] B[0; 0] C[16.5; 28.57988383249]
Centroid: CG[16.5; 9.52662794416]
Coordinates of the circumscribed circle: U[16.5; 9.52662794416]
Coordinates of the inscribed circle: I[16.5; 9.52662794416]

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.