# 3.MD.C.7d- Finding the Area of Rectilinear Figure_Karim's Garden

## 3.MD.C.7d- Finding the Area of Rectilinear Figures

Evidence Statement 3. C.3-2 Base arithmetic explanations or reasoning on concrete referents such as diagrams (whether provided in the prompt or constructed by the student in their response) connecting the diagrams to a written (symbolic) method.

### Karim's Garden

Karim’s garden is pictured below.

This is a rectilinear figure. One rectangle is 6 feet by 4 feet. The other rectangle is 3 feet by 7 feet.

What is the area, in square feet, of both parts of Karim’s Garden altogether?

Show all your work or explain how you found the total area of Karim’s garden.

### Scoring Rubric

Score 2 Student response includes the following 2 elements.

• Computation component = 1 point

o   The student provides the correct total area 45 square feet.

• Reasoning component = 1 point

o   The student provides a valid explanation for how to find the total area or valid work for finding the total area.

Score 1 Student response include 1 of the above elements.

Score 0 Student response is incorrect or irrelevant.