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A triangle is a polygon with three sides (and three vertices)

In an isosceles triangle, the angles opposite the sides of equal length are called base angles, the sides of equal length form the vertex angle, and the third ...

The perimeter of a polygon is the distance around it. To find the perimeter of a polygon, we simply add the lengths of its sides

You need to get familiar with the bar graphs and understand some concepts in order to interpret it the right way

You can better understand the bar graphs through a real-life example.

A pictograph is like a bar graph, but the bars are made from pictures or symbols. A key tells the meaning (or value) of each symbol.