Page 35, the fifth question, the chicken coop is 15 meters long, how many meters wide, and how long is the fence of what chicken coop?
When the perimeters are equal, the area of the circle is the largest. So: radius: 3 1.4÷3. 14÷2=5 (m) area: 5×5×3. 14=78.5 (m2) A: the maximum area is 78.5m2. Q: Are you sure? Answer: Don't worry, it's guaranteed! Follow-up: Then I'll copy it down. Thanks for adoption.