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Transcript of geometry
home of super cow Someone has stolen the geometric shapes of the world!!! I, Billy the super cow along with my trusty sidekick Tessa must find them! day 1
Acute Angle Come on Tessa. Lets see if we can find some here. I see one, it's an acute angle. An angle less than 90 degrees. Acute Triangle Look! I found a acute triangle! It has all acute angles.
NOW THATS MATH!!! Chord Look right here! I found a chord. A line segment that touches two points on a circle, but doesn't have to go through the center. circle Over here!!! It's a circle! A round shape whose boundary consists of points at an equal distance from a fixed center. Cone Look at that shape over there! I think it's a cone. A 3-D figure with a circular base and a curved side surface that tapers to a single vertex. Congruent Look at those bowls over there. They are congruent! They are the same size and shape! cube Look at this Tessa, its a cube!!! A 3-D figure with 6 congruent square faces. cylinder Look Billy, that can you are drinking from is another shape! It's a cylinder! A 3-D figure with 2 parallel and congruent circles as bases. Decagon Look at the pinata. It's a decagon! A decagon is any ten sided polygon, most commonly known as a star. Diameter Look at that line segment! I believe it's called a diameter. A line segment that touches 2 points on a circle and runs through the middle of the circles center. Equilateral Triangle Look at that equilateral triangle over there. It has all congruent sides and angles. Hexagon A hexagon is beneath you super cow. It is a 6 sided polygon. Intersecting line segments Look at those lines Billy. I believe that they are called intersecting line segments because they cross over each other. Isosceles Triangle Look at that thing over there. Isn't that an isosceles triangle which has 2 congruent sides and angles? Line of Symmetry Look on the window. I believe it is a line of symmetry because the shape is divided into 2 congruent parts by a line segment. Line Segment I believe that line over there is called a line segment because it is a portion of a line with 2 end points. Obtuse Angle That fan you are holding has an obtuse angle which is a angle greater than 90 degrees. Obtuse Triangle On the Christmas star I see an obtuse triangle which is a triangle with one obtuse angle. Octagon Look at my fish bowl. If you look closely, you will see an 8 sided top which is an octagon. Pentagon where did it go? GULP! GULP! GULP! PINATA!!! PINATA!!! DING!!! DONG!!! WHERES THAT FLY? ARR!!! Hey Billy,i found a pentagon.It's a 5- sided polygon. parallel Look on the stairs!!! I see a pair of parallel lines.Which are line segments that never cross over each other Parallelogram Look at this Billy. I think this shape is called a parallelogram. A quadrilateral with opposite sides that are parallel Perpendicular Look at those lines over there Billy. I believe they are called perpendicular lines because they have 2 line segments that cross at a right angle. polygon Radius rectangle rectangular prism rhombus right angle right triangle scalene triangle similar sphere square square pyramid trapezoid triangular prism vertical Geometry Rocks!!! - Tessa DeLaFuente where is that trapezoid? is there something on my face? I found a polygon Billy. It is a closed figure with all straight sides with a minimum of 3. Look at that line inside the circle. I believe that the line is called a radius because it is extending from the center of the circle to the outside. That quadrilateral over there is familiar to me, Billy. I believe it's called a rectangle with opposite sides congruent and with all right angles. Look at this! These are rectangular prisms. They are 3-D figures with 2 congruent rectangular bases connected by 4 rectangular sides. This is a rhombus, it is a quadrilateral with 4 congruent sides. That is a right angle Billy. It's an angle that measures exactly 90 degrees. The triangle behind you is called a right triangle. A triangle with 1 right angle That triangle up there is a scalene triangle. A triangle no congruent sides. Those towels on the rack, not exactly congruent but have the same shape and not the same size. That ball underneath you Billy is what is known as a sphere. A 3-D figure made of points equidistant from a center point. That shape on the wall is a square. A quadrilateral with 4 congruent sides and 4 right angles. That object behind you Billy is a square pyramid. A 3-D shape with a square base and 4 triangular sides that share a common vertex. Look at the glass, see the trapezoid? A trapezoid is a quadrilateral with only 1 set of parallel line segments. The clip on your head Billy is a triangular prism. A 3-D figure with 2 congruent triangular bases connected by 3 rectangular sides. A vertical line Billy like the one you are sitting on is a line situated at right angles to the horizon or upright. Gomez per.7
February 1, 2013