IKMC 2005 - Grades 7-8 - Self-study Question 21

Question 21

Rectangles ABCD and DBEF are shown. What is the area of DBEF?

1. $10\text{ cm}^2$
2. $12\text{ cm}^2$
3. $14\text{ cm}^2$
4. $16\text{ cm}^2$