## Surface Area of Prisms

Surface area is the total area of the faces of a solid figure. To find the surface area of a prism you must add the area of all of the faces of the given prism. Better yet, you can use the formula: Surface Area = 2(b•h) + 2(b•w) + 2(h•w) Example 1: Find the Surface Area of the … Read moreSurface Area of Prisms

## Area of Trapezoids

A trapezoid is a polygon with only one pair of parallel lines. To find the area of a Trapezoid we use the following formula: A = h • (b1+b2) ÷ 2   Example 1:   Step 1: Write the formula A = h • (b1+b2) ÷ 2 Step 2: Substitute the variables A = 5 • (8 + 4) ÷ 2 Step … Read moreArea of Trapezoids

## Area of Triangles

The area of a Triangle is the number of square units it takes to exactly fill the interior of a triangle. Formula for finding the area of a triangle is: A = (b • h) ÷ 2   Example 1: Step 1: Write the formula A = (b • h) ÷ 2 Step 2: Substitute the variables with the … Read moreArea of Triangles

## Area of Parallelograms

The area of a polygon is the number of square units inside the polygon. Area is 2-dimensional and is the space taken up inside a polygon. A parallelogram is a 4-sided shape formed by two pairs of parallel lines. Opposite sides are equal in length and opposite angles are equal in measure. To find the … Read moreArea of Parallelograms