# geometry pointa point is an exact location in space. a point has no length or width. to identify a...

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Geometry POINT A point is an exact location in space. A point has no length or width. To identify a point you use a dot and name it with a capital letter. For example: point A would look like this - . A You would say this is “Point A.”

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• GeometryPOINTA point is an exact location in space.A point has no length or width.To identify a point you use a dot and name it with a capital letter.For example: point A would look like this -.AYou would say this is Point A.

• GeometryLine:A line is a straight path of points that never ends. It goes on forever in two directions.When you draw a line you name it by using any two letters on the line. Another way to name a line is to use a single small letter...ABa

• Geometry..ABa

• GeometryTypes of lines:HORIZONTAL LINES A horizontal line goes straight across like the horizon...

• GeometryMore lines:Intersecting lines:Intersecting lines are lines that cross. They cross at a point. For example, think about streets that meet and cross at intersections.Line AB intersects line CD at point E.

• GeometryMore lines:PERPENDICULAR LINESWhen two intersecting lines meet to form square corners, they are called perpendicular lines.

• GeometryMore lines:PARALLEL LINESParallel lines are always the same distance apart. They will never cross, or intersect, one another, like railroad tracks.

• GeometryThink of a line as a rope that never ends. You can cut the rope into pieces. Each piece is a segment of a the rope.LINE SEGMENTA line segment is a part of a line.You name a line segment by using its two endpoints.

• GeometryRAYA ray is a part of a line. It has one endpoint and goes on forever in one direction.endpointUse the endpoint as the first letter when writingthe name of a ray.Ray OBWhen you see a little One-headed arrow, sayray.

• GeometryANGLEAn angle is formed when two rays meet at an endpoint.The endpoint is called the vertex of the angle.Point B is the vertex of the angle.

• GeometryYou can name an angle by writing the point on one ray, the vertex, and the point on the other ray.When you see a sharp corner symbol say angle.The vertex is always written in the middle.

• GeometryKINDS OF ANGLESYou can name angles by how the measure compared to 90 degrees.ACUTE ANGLESAcute angles measure less than 90 degrees.

• GeometryKINDS OF ANGLESYou can name angles by how the measure compared to 90 degrees.OBTUSE ANGLESObtuse angles measure greater than 90 degrees.

• GeometryKINDS OF ANGLESYou can name angles by how the measure compared to 90 degrees.RIGHT ANGLESRight angles measure exactly 90 degrees.

• GeometryKINDS OF ANGLESSTRAIGHT ANGLESA straight angle measures 180 degrees. It looks like a straight line.

• GeometryPolygonsA polygon is a closed figure whose sides are all line segments.PolygonsNot Polygons

• GeometryPolygonsThe name of a polygon depends on the number of sides it has.triangle3 sidesquadrilateral 4 sidespentagon 5 sideshexagon6 sidesoctagon8 sides

• GeometryPolygonsThe name of a polygon depends on the number of sides it has.A polygon that has all sides the same length and all angles the same measure is called a regular polygon.

• GeometryQuadrilateralsA quadrilateral has 4 sides.Some quadrilaterals have more than one name.This quadrilateral is also called a trapezoid.A trapezoid has exactly one pair of parallel lines.

• GeometryQuadrilateralsA quadrilateral has 4 sides.These quadrilaterals are also called parallelograms.A parallelogram has two pairs of sides that are the same length and are parallel.The sides marked in red are parallel to each other. They are the same length. The sides marked in green are parallel to each other. They are the same length.

• GeometryLets look at just the parallelograms!Each of these two parallelograms is also called a rhombus.A rhombus has all sides the same length.

• GeometryLets continue to just look at the parallelograms.Each of these two parallelograms is also called a rectangle.A rectangle has 4 right angles.

• GeometryThis figure is both a rhombus and a rectangle. It has all sides the same length and it has 4 right angles.It is called a square.

• GeometryA triangle is a polygon with three sides.Triangles can be named two different ways.First:Named by its angles.

• GeometryTriangles can be named two different ways.Second:Named by the length of its sides.

• GeometrySolid FiguresSolid figures have three dimensions: length, width, and height.Simple solid figure: PRISMSCYLINDERSCONESPYRAMIDSSPHERES

• GeometryNames of Solid FiguresprismsA 3-dimensional figure that has two congruent and parallel faces that are polygons. The rest of the faces are parallelograms.

• GeometryNames of Solid FigurespyramidsA 3-dimensional figure whose base is a polygon and whose other faces are triangles that share a common vertex.

• GeometryNames of Solid FiguresA 3-dimensional figure with two circular bases that are parallel and congruent.

• GeometryNames of Solid FiguresA 3-dimensional figure with one curved surface, one flat surface (usually circular), one curved edge, and one vertex.

• GeometryNames of Solid FiguresA solid figure made up of points that are all the same distance from a point called the center.

• GeometryParts of Solid FiguresA face of a solid figure is a flat surface.An edge is a line segment where two faces meet.A vertex is a point where two edges meet, or the tip of a cone.

• GeometryParts of Solid FiguresThis figure has 6 faces, 12 edges, and 8 vertices.The plural of vertex is vertices.

• GeometryParts of Solid FiguresSome faces are called bases.Prisms have two bases.A cylinder has 2 circular faces which are bases.A pyramid has 1 base and a face for each side of the base.

• GeometrySolid FiguresIf you could cut a prism or pyramid along some edges, you could unfold the figure into a flat shape. This is a pattern for the figure and it is called a net. Triangular PyramidIt unfolds to look like this!

• GeometrySolid FiguresHere are some, but not all, nets for some prisms.

• GeometrySolid FiguresHere are some, but not all, nets for some pyramids.

• GeometrySolid FiguresFigures that have the same shape and size are congruent.When two figures are congruent, you can place one on top of the other and they will match exactly.

• GeometrySolid FiguresCongruent shapes can be turned and flipped.

• GeometrySolid FiguresIn geometry, similar figures have the same shape. Sometimes they are the same size. Sometimes they are different sizes.SimilarNot Similar

• GeometrySymmetrySome figures can be folded in such a way that the parts of the figure match exactly.We say these figures have symmetry.

• GeometrySymmetryThe line where you fold the figure is called a line of symmetry.

• GeometrySymmetryA figure may have more than one line of symmetry.A square has 4 lines of symmetry.

• GeometrySymmetryDo the following figures have a line of symmetry?NONONOYESYESYES

• GeometryTransformationsWhen you slide a figure, it doesnt change in any way except that it is now in a different place.Another name for a slide is a translation.

• GeometryTransformationsWhen you flip a figure across a line, the new figure looks like a reflection of the original figure.Another name for a flip is a reflection.The line is called a line of reflection. The two figures are mirror images of one another.

• GeometryTransformationsWhen you turn a figure, it spins around a point. It looks different, but it is still congruent to the original figure.Another name for a turn is a rotation.

• GeometryTransformationsWhat type of transformation is being shown?? turn orrotation slide or translation turn or rotation flip or reflection