Florida B.E.S.T. MA.912.GR.4.6

MathGrades 9–12Use geometric measurement and dimensions to solve problems.

The Standard

Solve mathematical and real-world problems involving the surface area of three-dimensional figures limited to cylinders, pyramids, prisms, cones and spheres.

Florida B.E.S.T. Standards for Mathematics

Teacher's field guide

What This Standard Means

What Students Need to Do

Students find the total surface area of prisms, pyramids, cylinders, cones, and spheres. They choose appropriate formulas, use given dimensions correctly, and apply results to costs, coverings, or materials.

What Mastery Looks Like

Students select the correct area formulas, identify needed dimensions, and combine all exposed surfaces. They can solve for missing measures when needed and explain whether their answer is reasonable.

Common Misconceptions

Students often mix up lateral area and total area, or leave out a base. They may use diameter as radius, confuse slant height with vertical height, or report cubic units.

How to Assess It

Give students a labeled cone and rectangular prism. Ask them to find each total surface area, show the formula substitutions, and label answers in square units.

Lesson moves

Ways to Teach It

  1. Give pairs cardboard packages to measure, sketch as nets, and calculate surface area before checking by adding each face separately.

  2. Ask students to explain why a cone’s slant height, not its vertical height, appears in the lateral area formula.

  3. Run a matching game with figure cards, dimension diagrams, surface area formulas, and completed calculations.

  4. Have students calculate the paint and cost needed to cover a cylindrical water tank, excluding the base touching the ground.

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Printable MA.912.GR.4.6 Worksheet

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