Page 230 - ABCTE Study Guide_Neat

B

C

D

Answer

The correct answer is B. A translation is a transformation that slides a figure a certain distance in a certain
direction. Choice A shows rotation, which rotates a figure around a given point. Choice C shows a
reflection, which produces a mirror image of a figure over a line. Choice D doesn't show anything.

Review

• Transformations are changes to the size, shape, location, or orientation of a figure.
• Translation occurs when a figure is moved a certain distance in a certain direction.
• Reflection produces a mirror image of the original figure.
• Rotation moves an object around a point.

Three-Dimensional Figures, or Solids

Lesson Objective

In the coming lesson, we'll review the basic three-dimensional figures and some of their properties.

Previously Covered

In the section above, we discussed polygons and their properties. We also covered how figures can be
transformed; that is, they can change location, or orientation while not changing in size or shape.

Polyhedra

A polyhedron is a three-dimensional solid, each face of which is a polygon. Each pair of faces meet at
an edge. The corners of the edges meet at points called vertices.