## 2D geometry – A day at the beach (basic)

Concepts addressed: circle area, circle perimeter, sector of a circle area.Recommended grade: 10th.Difficulty level: Basic. Scenario: It’s a sunny summer morning and you’re thinking about going to the beach for a few hours. Actually, why not take your witty little sister with you, she could use some exercise with all the candy bars she’s been […]

## 2D geometry – Helping out on the ranch (advanced)

Concepts addressed: rectangle area, rectangle perimeter, rectangular prism sketching, percentages.Recommended grade: 5th.Difficulty level: Advanced.A basic version of Helping out on the ranch is also available. Scenario: Good Ol’ Uncle Joe invited you to his ranch for the weekend to help him plan out a barn for his horses. He has 14 horses, and each should

## 2D geometry – Helping out on the ranch (basic)

Concepts addressed: rectangle area, rectangle perimeter, square perimeter.Recommended grade: 5th.Difficulty level: Basic.An advanced version of Helping out on the ranch is also available. Scenario: Good Ol’ Uncle Joe invited you to his ranch for the weekend to help him set up an enclosure for his horses. He has 50 horses, and they should each have