# Geometry Essentials of Geometry

 The flashcards below were created by user MoonRacer on FreezingBlue Flashcards. What is a point? A point. It has no dimesnsion and is just a dot. What is a line? A one dimesioned figure that goes on forever. There is only one line no matter how many points are shown on the line. A line is named by the points on it. What is a plane A plane is a two dimesioned figure that extends without end in both directions. Planes can be name by three points that are not on the smae line. What are collinear points? Points that are on the same line What are coplanar points? Points that are on the same plane. What is a line segment? A line that contains enpoint and does not go on forever. What is a ray? A ray is a line with one endpoint, and one end goes on forever, like the suns rays. What are opposite rays? Rays that are on the same line and share and endpoint. For example, if C is between point A and B on a line, ray CA is the opposite ray of CB What is an intersection? The points that something shares. This can be a line, point, plane, multiple points, etc. Will two planes always intersect at a line? Yes Remember to draw every possible thing you can in order to visualize! Okay If B is bwtween A and C what + what = AC? AB+BC=AC What is segment addition? It is adding two segments together to become a larger segment, like AB+BC=AC if B is between A and C on the same line. What does congruent mean? Equal to. It does not deal with measurements. What is a midpoint? A point on a segment that divides the line segment into two congruent segments. What is a segment bisector? Anything that intersects a line segment at the midpoint, wheter it be a ray, line, ect. It bisects the segment What is the midpoint formula? The mid point formula is (average the x's, average the y's).There are other formulas. but they cannot be written, so if you prefer a different version, look back in your notes! What is the distance formula used for? Find the distance or length between segments What is the distance formula? You can say:d2=(subtract the x's)2+(subtract the y's)2d= the square root of (x-x)2+(y-y)2Write it out!Count the boxes on a coordinate question if you can! What is an angle? Two rays that sare an endpoint. What is the vertex of an angle? The point where the two rays intersect. What are the five tiypes of angles and what classify them? 0o, then it is an acute trianlge.If it is <, then it is an obtuse trianlge AuthorMoonRacer ID156577 Card SetGeometry Essentials of Geometry DescriptionReview of the Essentails of Geometry Unit for the Regents Exam. Paper is recommended to use for studying so you can sraw out drawings. Updated2012-06-03T04:35:38Z Show Answers