# 457.3 457.3 457.3 triangle

### Equilateral triangle.

Sides: a = 457.3   b = 457.3   c = 457.3

Area: T = 90553.04108315
Perimeter: p = 1371.9
Semiperimeter: s = 685.95

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

Height: ha = 396.0333417151
Height: hb = 396.0333417151
Height: hc = 396.0333417151

Median: ma = 396.0333417151
Median: mb = 396.0333417151
Median: mc = 396.0333417151

Inradius: r = 132.011113905
Circumradius: R = 264.02222781

Vertex coordinates: A[457.3; 0] B[0; 0] C[228.65; 396.0333417151]
Centroid: CG[228.65; 132.011113905]
Coordinates of the circumscribed circle: U[228.65; 132.011113905]
Coordinates of the inscribed circle: I[228.65; 132.011113905]

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.