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