Grade 7 | Unit 7 | Lesson 14: Surface Area of Right Prisms | Practice Problems

Edge lengths are given in units. Find the surface area of each prism in square units. Description: Five prisms. Prism A, rectangular prism with dimensions 5, 8, 10. Prism B, base is a right triangle with sides 6, 8, 10, prism height 15. Prism C, rectangular prism with dimensions 5, 13, 4. Prism D, base is a right triangle with sides 5, 12, and 13, prism height is 8. Prism E, base is a triangle with sides 6, 5, 5 and height perpendicular to the 6 side is 4, prism height 12.

Priya says, 'No matter which way you slice this rectangular prism, the cross section will be a rectangle.' Mai says, 'I’m not so sure.' Describe a slice that Mai might be thinking of.

Find 44% of 625 using the facts that 40% of 625 is 250 and 4% of 625 is 25. What is 4.4% of 625? What is 0.44% of 625?