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35 Cards in this Set
- Front
- Back
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What are the 3 Transformations?
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Translation, Rotation and Reflection
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What is a Translation?
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A slide without turning or flipping
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What is a Rotation?
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A turn about a center point
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What is a Reflection?
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Flipping an image over a reflecting line
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What is a Tessellation?
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Using congruent shapes over and over to cover a flat surface.
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What polygons Tessellate?
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Triangles, Quadrilaterals, Regular Hexagons and others
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What polygons do NOT Tessellate?
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Regular Pentagons and most shapes with 7 or more sides
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What is Perpendicular?
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Two lines that meet at a right (90 degree) angle
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What is a right angle?
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90 degrees
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What is an acute angle?
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less than 90 degrees
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What is an obtuse angle?
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More than 90 degrees
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How many degrees make a straight line?
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180
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What is a linear pair?
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Two angles right next to each other that form a straight line and add to 180 degrees.
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What is supplementary?
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ANY two angles that add up to 180 degrees.
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What are vertical angles?
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Two angles that are across from each other when you see an X. They are always congruent
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What does congruent mean?
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Exactly the same shape and size
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What is n-fold rotational symmetry?
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The number of times you can turn a shape and it looks exactly the same. To find the degree of rotation take 360 ÷ n.
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What are exterior angles?
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On the outside of the parallel lines
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What are interior angles?
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On the inside of the parallel lines
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What are alternate interior angles?
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On the inside and jump across the line. They are congruent.
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What are alternate exterior angles?
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They are outside of the parallel lines and jump across the lines. They are congruent.
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What are Corresponding angles?
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Angles in the same location that are congruent. Ex. above the parallel lines and to the left of the other line.
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What is the symbol for parallel?
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ll
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In a parallelogram what are the opposite sides?
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Straight across and are congruent.
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In a parallelogram, what are the opposite angles?
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Straight across and are congruent.
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In a parallelogram, what are consecutive angles?
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The angles on the same side and they are supplementary.
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How many symmetry lines does a parallelogram have?
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none
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What kind of rotation symmetry does a parallelogram have?
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2-fold which is 180 degree
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What is a rhombus?
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a special parallelogram with all equal sides (looks like a diamond)
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What is a rectangle?
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a special parallelogram with all right angles
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What is a square?
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A special parallelogram with all equal sides and all right angles. It has 4 symmetry lines and 90 degree rotational symmetry.
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How do you find distance on a number line?
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subtract and make your answer positive
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How do you find distance between two points (x,y) and (x,y)?
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Take the square root of the
(x-distance)^2 + (y-distance)^2 |
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What do all the angles in a triangle always add up to?
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180 degrees
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What do all the angles in a quadrilateral (four sides) add up to?
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360 degrees
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