Below are common problems found in Lesson 4 practice sheets, along with their solutions. 1. Triangular Prism Dimensions
158 cm²
Use the appropriate formula for the area of the polygonal base. lesson 4 homework practice surface area of prisms
Find the surface area of a rectangular prism with length 8 cm, width 3 cm, and height 5 cm.
SA=2lw+2lh+2whcap S cap A equals 2 l w plus 2 l h plus 2 w h Identify your dimensions: Find the Length ( ), Width ( ), and Height ( Multiply in pairs: Calculate the area of the bottom ( ), the front ( ), and the side ( Below are common problems found in Lesson 4
Understanding this formula is your first victory—it works for any right prism, regardless of the shape of the base (triangle, rectangle, pentagon, etc.).
432 in²
Imagine taking a cardboard box and unfolding it until it lies flat on the floor. This flat shape is called a . To find the total surface area, you simply find the area of every individual shape in that net and add them together. 2. Rectangular Prisms: The "Pairs" Method
A rectangular prism has six faces, and they come in three matching pairs (top/bottom, front/back, left/right). Find the surface area of a rectangular prism
Each of the three sides might have different dimensions depending on whether the triangle is equilateral, isosceles, or scalene. Find the area of each rectangle individually ( Total: Add the triangles and the three rectangles together. 4. Common Pitfalls to Avoid