Lesson 14
Surface Area of Right Prisms
Let’s look at the surface area of prisms.
Problem 1
Edge lengths are given in units. Find the surface area of each prism in square units.
Problem 2
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.
Problem 3
\(B\) is the intersection of line \(AC\) and line \(ED\). Find the measure of each of the angles.

Angle \(ABF\)

Angle \(ABD\)

Angle \(EBC\)

Angle \(FBC\)

Angle \(DBG\)
Problem 4
Write each expression with fewer terms.
 \(12m4m\)
 \(12m5k+m\)
 \(9m+ k(3m2k)\)
Problem 5
 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?