Unit 1, Lesson 12
What Is Surface Area?
Grade 6
Practice
Problem 1
What is the surface area of this rectangular prism?
16 square units
32 square units
48 square units
64 square units
Problem 2
Which description can represent the surface area of this trunk?
The number of square inches that cover the top of the trunk.
The number of square feet that cover all the outside faces of the trunk.
The number of square inches of horizontal surface inside the trunk.
The number of cubic feet that can be packed inside the trunk.
Problem 3
Which figure has a greater surface area?
Problem 5
Draw an example of each of these triangles on the grid.
- A right triangle with an area of 6 square units.
- An acute triangle with an area of 6 square units.
- An obtuse triangle with an area of 6 square units.
Problem 6
Find the area of triangle \(MOQ\) in square units. Show your reasoning.
Triangle MOQ is enclosed in rectangle MNPR. Sides RM and PN of the rectangle are 6 units high and sides RP and MN are 10 units long. Vertex Q is on side RP, 5 units from R and vertex O is on side PN, 2 units down from P.
Problem 7
Find the area of this shape. Show your reasoning.