4 Area and Perimeter: RL #4 (irregular polygons)

Front

What is area?

Back

Area is the amount of space inside a shape, measured in square units.

Front

What is perimeter?

Back

Perimeter is the distance around a shape, calculated by adding the lengths of all its sides.

Front

How do you find the area of a rectangle?

Back

Multiply the length by the width (Area = length × width).

Front

How do you find the perimeter of a rectangle?

Back

Add the lengths of all four sides (Perimeter = 2 × (length + width)).

Front

What is an irregular polygon?

Back

An irregular polygon is a shape with sides and angles that are not all the same.

Front

How do you find the area of an irregular polygon?

Back

Divide the shape into regular shapes (like triangles or rectangles), find their areas, and then add them together.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 × base × height.

Front

What is the formula for the area of a square?

Back

Area = side × side.

Front

If a shape has an area of 42 square units, what does that mean?

Back

It means that the space inside the shape can fit 42 unit squares.

Front

If the perimeter of a shape is 24 units, what does that mean?

Back

It means that if you walked around the shape, you would travel 24 units.