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| A Point is a figure ending a line andcreating a line-segment.[image] |
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A line is a straight path connecting two points and extending beyond the points in both directions.
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A segment is a limited line between to end points
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A ray is a part of a line extending in ONE direction from a point.
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A plane is a flat surface extending in all directions.
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An opposite ray is a ray that start at the same point and extend in exact opposite directions.
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Collinear is when 2 or more points lie on the same line.
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Coplanar is when two or more points are on the same plane.
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An angle is two rays sharing the same endpoint. They are measured in degrees.
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A midpoint is the center of a line that divides it in half. M is the midpoint.
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A bisector is a ray that divides an angle in half.
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Congruent is when two shapes are similar and have the same side lengths.
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A vertex is a corner point of a geometric figure.
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Acute Angles are under 90 degrees.
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Obtuse Angles are over 90 degrees but less than 180 degrees.
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Right Angles are exactly 90 degrees.
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Straight Angles are exactly 180 degrees.
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Complementary Angles are two angles that add up to 180 degrees.
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Supplementary Angles are two angles that add up to 90 degrees.
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Vertical Angles are two angles that are opposite each other at the intersection of two lines.
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Adjacent Angles are angles that share a side and a vertex.
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Linear Pairs are angles that are Linear and add up to 180 degrees.
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Perpindicular Lines are lines that cross each other at a 90 degree angle.
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A Polygon is a closed figure that has at leats three congruent angles.
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A Pentagon is a polygon with five sides.
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A Hexagon is a polygon with six sides.
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An Octagon is a polygon with eight sides.
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A Decagon is a polygon with ten sides.[image]
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A Dodecagon is a polygon with twelve sides.
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An N-Gon is a polygon with n sides.
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A Concave Polygon has angles over 180 degrees. A Convex Polygon has angles under 180 degrees.
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A Regular Polygon has congruent sides and angles. An Irregular Polygon has some congruent sides and angles.
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A Diagonal is the length between two opposite points in a figure.
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A Side is a line segment that makes up a polygon.
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The Perimeter is the total distance around a polygon. Picture below.
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