2D shapes, 3D solids and Cross Sections Flashcard

Front

What is a 2D shape?

Back

A 2D shape is a flat figure that has only two dimensions: length and width. Examples include circles, squares, and triangles.

Front

What is a 3D solid?

Back

A 3D solid is a three-dimensional object that has depth in addition to length and width. Examples include cubes, spheres, and pyramids.

Front

What is a cross section?

Back

A cross section is the shape that is obtained when a solid is cut through by a plane.

Front

What is the 2D cross section of a cylinder when cut horizontally?

Back

Circle.

Front

What is the 2D cross section of a cylinder when cut vertically?

Back

Rectangle.

Front

What is the 2D cross section of a cone when cut horizontally?

Back

Circle.

Front

What is the 2D cross section of a cone when cut diagonally?

Back

Ellipse.

Front

What is the 2D cross section of a square-based pyramid when cut horizontally?

Back

Square.

Front

What is the 2D cross section of a square-based pyramid when cut diagonally?

Back

Triangle.

Front

What shape is formed by the cross section of a right triangular prism when cut perpendicular to the bases?

Back

Rectangle.