- Plane Geometry
- Solid Geometry
The tangram is an ancient Chinese puzzle consisting of seven flat geometric shapes. These shapes, called tans, include one square, one parallelogram and five right isosceles triangles which are all...
- Percents and Fractions
- Plane Geometry
- Probability, Counting and Combinatorics
It’s Autumn, and that means leaves are falling! Amber’s house occupies 2650 ft2 in the middle of a 50-foot by 80-foot parcel of land, and the leaves that fall cover the ground all around her house. If...