Error Analysis – GEOMETRY Read the word problem. Look at the students work and solution. Identify the error and describe it. Solve the problem correctly. Then
share a strategy this student could use to prevent the same error in the future,
Marcia is placing a fence around the circular flower bed in her garden. The diameter of the flower bed is
3 feet. How much fencing should Marcia use? Use 3.14 for T. Round to the nearest tenth if necessary.
Incorrect Work/Solution
Identify and explain the
Error
d = 3 → -1.5
A -
A = 1 (1.5)2
A =(3.14)(2.25)
A-7.065
A = 7.1
Marcia needs to use 7.1 square feet of fencing.
Correct Work/ Solution
Share a Strategy