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Level 95

Geometry in Three-Dimensions


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net
A flat surface that folds up into a three-dimensional figure
Edge
Where two surfaces join (intersect).
face
The flat surface of a 3D shape.
vertex
The point where two sides meet. (Shared end points of the line segments of a polygon.)
cube
A solid shape that has: 6 square faces all equal in size, 8 vertices (corners), and 12 equal edges.
Tetrahedron
A solid figure that has four triangular plane faces. If all four faces are congruent equilateral triangles, it is called a regular tetrahedron
prism
A solid geometric figure whose two end faces are similar, equal and parallel rectilinear figures, and whose sides are parallelograms.