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7 Cards in this Set
- Front
- Back
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Points |
a location |
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Planes |
a flat, two-dimensional surface that extends infinitely far
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segment |
a part of a figure cut off by a line or plane intersecting it, in particular
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ray |
A portion of a line which starts at a point and goes off in a particular direction to infinity. Try this Adjust the ray below by dragging an orange dot and see how the ray AB behaves. Point A is the ray's endpoint
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angle bisector |
The bisector of an angle is a ray whose end point is the vertex of the angle and which divides the angle into two equal angles. In the diagram to the right, the ray CD is the bisector of the angle ACB if and only if the angles ACD and BCD have equal measures
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complementary angles |
Two Angles are Complementary when they add up to 90 degrees (a Right Angle)
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perpendicular lines |
Perpendicular means "at right angles". A line meeting another at a right angle, or 90° is said to be perpendicular to it.
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