WGU D659 Task 1: Formative Assessment |Latest
Update with Complete Solution
Formative Assessment Question 1:
Sarah is building a fence around her entire rectangular garden. The garden is 8 feet long
and 5 feet wide.
How many feet of fencing does she need? Be sure to explain how you arrived at your
answer.
Correct Answer:
Sarah needs 26 feet of fencing.
Key Understanding:
Perimeter is the measurement of the distance around an object. To calculate the perimeter
of the rectangular garden, add all four sides together to get a total. The four sides of the
garden are added together: 8 + 8 + 5 + 5 to give a perimeter total of 26 feet. Due to the
reciprocal property of addition, you can add the sides in any order, and you will always
arrive at the same answer.
Student Answers
Mina Russell: a 12- (Provides a correct answer)
year-old female with
dark hair, wearing a I added 8 + 5 to get 13. Then I added 13 + 13 to find my answer.
light blue shirt Sarah needs 26 feet of fencing.
Will Ingraham: an (Provides a correct answer)
11-year-old male with
light brown hair, I added 8 + 8 + 5 + 5 to find my answer. Sarah needs 26 feet of
wearing a red polo fencing.
Jayla Reed: a 12- (Provides an incorrect answer)
year-old female with
dark hair, wearing a Sarah needs 40 feet of fencing. I multiplied 5 × 8 to get 40.
green shirt
Emily Brinkerhoff: (Provides an incorrect answer)
an 11-year-old
female with brown I added each side to get my answer. 8 + 5 is equal to 13. Sarah
hair, wearing a needs 13 feet of fencing.
yellow shirt
Carlos Cordova: an (Provides a partially correct answer due to the unit being
11-year-old male with incorrect. The correct unit for the perimeter or distance around
dark hair, wearing a the fence is feet, but Carlos incorrectly gave the measurement
navy polo unit for area, square feet.)
Sarah needs 26 square feet of fencing. I added 8 + 5 + 8 + 5 to
find my answer.
Formative Assessment Question 2:
Marcus is making a rectangular rug for his room. The rug is 6 feet long and 4 feet wide.
What is the area of the rug? Be sure to explain how you arrived at your answer.
Correct Answer:
The area of the rug is 24 square feet.
Key Understanding:
Area is the measurement of the amount of surface covered by an object. To calculate the
area of the rectangular rug, multiply the length times the width. The area of this
Update with Complete Solution
Formative Assessment Question 1:
Sarah is building a fence around her entire rectangular garden. The garden is 8 feet long
and 5 feet wide.
How many feet of fencing does she need? Be sure to explain how you arrived at your
answer.
Correct Answer:
Sarah needs 26 feet of fencing.
Key Understanding:
Perimeter is the measurement of the distance around an object. To calculate the perimeter
of the rectangular garden, add all four sides together to get a total. The four sides of the
garden are added together: 8 + 8 + 5 + 5 to give a perimeter total of 26 feet. Due to the
reciprocal property of addition, you can add the sides in any order, and you will always
arrive at the same answer.
Student Answers
Mina Russell: a 12- (Provides a correct answer)
year-old female with
dark hair, wearing a I added 8 + 5 to get 13. Then I added 13 + 13 to find my answer.
light blue shirt Sarah needs 26 feet of fencing.
Will Ingraham: an (Provides a correct answer)
11-year-old male with
light brown hair, I added 8 + 8 + 5 + 5 to find my answer. Sarah needs 26 feet of
wearing a red polo fencing.
Jayla Reed: a 12- (Provides an incorrect answer)
year-old female with
dark hair, wearing a Sarah needs 40 feet of fencing. I multiplied 5 × 8 to get 40.
green shirt
Emily Brinkerhoff: (Provides an incorrect answer)
an 11-year-old
female with brown I added each side to get my answer. 8 + 5 is equal to 13. Sarah
hair, wearing a needs 13 feet of fencing.
yellow shirt
Carlos Cordova: an (Provides a partially correct answer due to the unit being
11-year-old male with incorrect. The correct unit for the perimeter or distance around
dark hair, wearing a the fence is feet, but Carlos incorrectly gave the measurement
navy polo unit for area, square feet.)
Sarah needs 26 square feet of fencing. I added 8 + 5 + 8 + 5 to
find my answer.
Formative Assessment Question 2:
Marcus is making a rectangular rug for his room. The rug is 6 feet long and 4 feet wide.
What is the area of the rug? Be sure to explain how you arrived at your answer.
Correct Answer:
The area of the rug is 24 square feet.
Key Understanding:
Area is the measurement of the amount of surface covered by an object. To calculate the
area of the rectangular rug, multiply the length times the width. The area of this
