explain the basics of area and perimeter

Area and per imeter are two important concepts in geometry that are used to describe the size and shape of two - dimensional objects . \n \n Area is a measure of the amount of space inside a two - dimensional object , such as a rectangle , triangle , or circle . It is typically measured in square units , such as square meters or square inches . The formula for calculating the area of a rectangle is length x width , while the formula for a triangle is ( base x height ) / 2 , and for a circle it is pi x radius ^ 2 . \n \n Per imeter is a measure of the distance around the outside of a two - dimensional object , such as a rectangle , triangle , or polygon . It is typically measured in linear units , such as meters or feet . The formula for calculating the per imeter of a rectangle is 2 x ( length + width ), while the formula for a triangle is length + width + height . \n \n It ' s important to note that the per imeter of a circle is calculated differently , it ' s the circum ference which is the distance around the circle and it ' s calculated by pi x radius . \n \n In summary , area is a measure of the amount of space inside a two - dimensional object , while per imeter is a measure of the distance around the outside of the object . Both area and per imeter are important concepts in geometry and are used to describe the size and shape of various two - dimensional objects . </s>