Area and Perimeter Concepts

This video tutorial covers the calculation of area and perimeter for composite figures, including triangles, trapezoids, circles, and semicircles. It explains the use of formula sheets, the concept of perimeter and circumference, and how to find shaded areas by subtracting inner shapes from outer shapes. The tutorial also includes practical examples, such as calculating the perimeter of a garden with a walkway.

What is a composite figure?

• A shape made of only circles

• A shape made by combining two or more simple shapes

• A shape made of only triangles

• A shape with no defined area

How can you calculate the perimeter of a composite figure?

• By subtracting the areas of all shapes

• By adding the areas of all shapes

• By finding the distance around the figure and adding it up

• By multiplying the areas of all shapes

What does the 'b' stand for in the area formula for a triangle?

• Base

• Balance

• Breadth

• Boundary

What is the formula for the area of a triangle?

• Base minus height

• One-half base times height

• Base times height

• Base plus height

In a trapezoid, what is the height?

• The longest side

• The shortest side

• The diagonal

• The side at a right angle to the bases

What is the formula for the area of a circle?

• Pi times diameter squared

• Pi times radius squared

• Diameter times radius

• Pi times diameter

How do you calculate the area of a semi-circle?

• Pi times diameter squared

• Pi times radius squared

• Pi times diameter divided by two

• Pi times radius squared divided by two

What is the first step in finding the area of a composite figure?

• Add all perimeters

• Subtract the smallest shape

• Divide the figure into known shapes

• Multiply all dimensions

How do you find the perimeter of a composite figure?

• Divide the total area by the number of sides

• Subtract the inner shapes

• Multiply the lengths of all sides

• Add the lengths of all outer sides

What is the area of a rectangle with a length of 52 and a width of 41?

• 2142

• 2132

• 2152

• 2131