Two-Dimensional Shapes
* Quadrilaterals:
* Square: 4 equal sides, 4 right angles
* Rectangle: 4 sides, 4 right angles, opposite sides equal
* Rhombus: 4 equal sides, opposite angles equal
* Parallelogram: Opposite sides parallel and equal, opposite angles equal
* Trapezoid: One pair of parallel sides
* Kite: Two pairs of adjacent sides equal
* Triangles:
* Equilateral: 3 equal sides, 3 equal angles
* Isosceles: 2 equal sides, 2 equal angles
* Scalene: No equal sides, no equal angles
* Right Triangle: One right angle (90 degrees)
* Other Shapes:
* Circle: All points are equidistant from the center
* Polygon: A closed shape made of straight line segments
Three-Dimensional Shapes
* Cube: 6 square faces, 12 edges, 8 vertices
* Rectangular Prism: 6 rectangular faces, 12 edges, 8 vertices
* Cylinder: 2 circular bases, curved surface
* Cone: Circular base, curved surface that comes to a point
* Sphere: All points are equidistant from the center
* Pyramid: Base is a polygon, triangular faces meet at a point
Concepts:
* Angles: Measuring and classifying angles (acute, obtuse, right)
* Symmetry: Line and rotational symmetry
* Perimeter and Area: Calculating the perimeter and area of various shapes
This list may vary slightly depending on the specific curriculum being used. It's important to check with your child's teacher or textbook for the exact content covered in their fourth-grade math class.