Practice questions available in McGraw Hill Math Grade 6 Answer Key PDF Lesson 23.6 Surface Area will engage students and is a great way of informal assessment.
McGraw-Hill Math Grade 6 Answer Key Lesson 23.6 Surface Area
Exercises
FIND THE SURFACE AREA
Question 1.
Answer:
l = 9
b = 2
h = 3
SA = 2(lw + lh + hw)
SA = 2(9 × 2 + 9 × 3 + 3 × 2)
SA = 2(18 + 27 + 6)
SA = 2(51)
SA = 102
Question 2.
Laura wants to cover a box in fabric for an art project. If the box is a square with 4-inch sides, how much fabric will she need to completely cover all the sides?
Answer:
s = 4 inch
A = 6s²
A = 6 × 4 × 4
A = 96 sq. inch
Question 3.
What is the surface area of the pyramid above if the base is a square with sides of 5 and each triangular side has an area of 10π?
Answer:
Given,
base = 5
height = 10π
A = a² + 2a√ a²/4 + h²
A = 25 + 10√ 25/4 + 985.96
A = 25 + 10(5/2) + 985.96
A = 1035.96 sq. units