Presentation on theme: "Line A straight path that goes on forever in both directions; it is named by any two points on the line. Z Y ZY or YZ."— Presentation transcript:
1 LineA straight path that goes on forever in both directions; it is named by any two points on the line.ZYZY or YZ
2 A piece of a line with two endpoints; it is named by its endpoints Line SegmentA piece of a line with two endpoints; it is named by its endpointsABAB or BA
3 RayA piece of a line with one endpoint and continues forever in the other direction; it’s named by its endpoint and another point on the rayRTRT
4 ParallelLines, segments, or rays that are always the same distance apart and NEVER intersect
5 Lines, segments, or rays that cross each other IntersectingLines, segments, or rays that cross each other
6 Lines, segments, or rays that intersect at 900 (right) angles PerpendicularLines, segments, or rays that intersect at 900 (right) angles
7 (THINK…car on the bridge compared to a boat on the water) SkewLines, segments, rays that will never intersect because they are in different planes(THINK…car on the bridge compared to a boat on the water)
8 AngleTwo rays that share the same endpoint; measured in degrees (from 0 to 3600)How to name this angle:MJKKJMJMJK
9 The point where 2 rays meet to form an angle VertexThe point where 2 rays meet to form an angleYVertexQN
10 A point that lies inside the two rays of an angle Interior PointA point that lies inside the two rays of an angleC
11 A point that lies outside the two rays of an angle Exterior PointA point that lies outside the two rays of an angleB
12 CongruentObjects that are exactly the same shape and size. When 2 shapes are exactly the same, then their parts (sides, angles, etc.) are the same.BYThese triangles are congruent!XAZC
13 How Many Degrees in a Triangle? The three angles in a triangle add up to 1800.So… if angle A is 900, and angle B is 300, then angle C will be = 600CBA
14 How Many Degrees in a Quadrilateral? The four angles in any quadrilateral add up to 3600.Examples of quadrilaterals:
15 CircleA flat, closed curve where every point on the edge is the same distance from the centercenter
16 RadiusA straight segment drawn from the center of a circle to a point on the outside edge; half the diameter**There are an infinite # of radii in a circle!
17 DiameterA straight segment drawn from one side of a circle to another THROUGH the center;twice the radius**There are an infinite # of diameters in a circle!
18 CircumferenceThe distance around the edge of a circle found by multiplying Pi (or Π) by the diameterC = Π x d
19 Pi (or Π)Ratio of the circumference of a circle to the diameter; Every circle’s circumference divided by its diameter is Π Approximately 3.14
20 PrismA 3-D shape with 2 congruent bases; all other faces are rectanglesPrisms are named by the shape of their basesSquare prismTriangular prism
21 PyramidA 3-D shape with one base and 3 or more triangular sides that meet at a vertex; pyramids are named by their baseSquare base, so thisis a square pyramid
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