3D figures
9 videos
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Basic geometry and measurement - 3D Figures: What You Need to Know
Learn the four key concepts of 3D figures: volume, surface area, nets, and cross sections. A foundational introduction to understanding three-dimensional shapes.
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Basic geometry and measurement - Volume of Rectangular Prisms
Learn how to calculate volume using length × width × height with whole numbers and fractions. Includes step-by-step examples and practical applications.
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Basic geometry and measurement - Volume Word Problem: Fish Tanks and Popcorn Boxes
Learn to calculate volume of rectangular prisms using real-world examples like fish tanks and popcorn boxes, including working with mixed numbers and proper cubic units.
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Basic geometry and measurement - How Changing Dimensions Changes Volume
Learn how scaling dimensions affects volume. Discover why doubling all three dimensions of a box multiplies its volume by 8, not 2.
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Basic geometry and measurement - Volume of Triangular Prisms
Learn how to calculate the volume of a triangular prism using the formula: area of triangle times length. Includes a step-by-step example with clear calculations.
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Basic geometry and measurement - What Are Nets of 3D Shapes?
Learn what nets are in geometry: flat 2D patterns that fold into 3D shapes. Explores cube and pyramid nets, plus tips for identifying which net matches which shape.
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Basic geometry and measurement - Surface Area of Rectangular Prisms
Learn how to calculate the surface area of a rectangular prism using the formula SA = 2lw + 2lh + 2wh by finding the area of all six faces.
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Basic geometry and measurement - Surface Area of Pyramids and Triangular Prisms
Learn how to calculate surface area by unfolding 3D shapes into nets. Examples include a triangular prism and square pyramid with step-by-step calculations.
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Basic geometry and measurement - Cross Sections of 3D Objects
Learn what cross sections are by slicing 3D shapes like cubes and pyramids. Discover how different cuts create different 2D shapes from the same object.