A Pie Chart is a circular chart divided into slices to show proportions of a whole. Each slice represents a percentage or fraction of a category compared to the total.

A pie chart is a circular chart divided into slices, where each slice represents a proportion of a whole. The size of each slice corresponds to the quantity it represents, making it easy to visualize the relationship between different parts of a dataset and their contribution to the total. Essentially, it's a way to show how a whole is divided into different categories or components. 

Here's a more detailed explanation:

Circular Shape:

The chart is a circle, and the entire circle represents 100% or the total of the data being represented. 

Slices:

The circle is divided into sections called slices, each representing a different category or component of the whole. 

Proportional Representation:

The size of each slice is proportional to the quantity it represents. Larger slices mean larger quantities, smaller slices mean smaller quantities. 

Visual Comparison:

Pie charts are useful for visually comparing the relative sizes of different parts of a whole. 

Common Uses:

They are often used to show how budgets are allocated, how votes are distributed in an election, or the composition of a population. 

Limitations:

While visually appealing, pie charts can become difficult to interpret if there are too many slices or if the differences between slice sizes are very small. 

Simple Pie Chart with Chart.js

<canvas id="myPieChart" width="300" height="300"></canvas>

<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<script>
 const ctx = document.getElementById('myPieChart').getContext('2d');

 const myPieChart = new Chart(ctx, {
   type: 'pie',
   data: {
     labels: ['Red', 'Blue', 'Yellow'],
     datasets: [{
       label: 'Colors',
       data: [30, 45, 25],
       backgroundColor: ['red', 'blue', 'yellow']
     }]
   },
   options: {
     responsive: true
   }
 });
</script>