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28 Cards in this Set
- Front
- Back
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Classify angles by size
Acute Right Obtuse |
Acute angle has less than 90 degrees
Right angle has 90 degrees Obtuse angle has more than 90 degrees |
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Complementary Angles
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Two angles whose sum is 90 degrees
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Supplementary Angles
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Two angles whose sum is 180 degrees
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Adjacent angles
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Two angles that share a vertex and have a common side which is between them
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Linear Pair
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Two adjacent angles whose sum is 180 degrees, thus forming a straight line
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Collinear
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Points which lie on the same line
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Coplanar
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Points, lines, rays, or segments which lie on the same plane
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Angle
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Two rays (sides) with a common endpoint (the vertex).
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Angle Bisector
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A ray which divides an angle into two congruent angles
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Area
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The amount of surface covered by a shape (measured in square units)
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Circumference of a Circle
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Distance around a circle
C = 2(pi)r |
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Perimeter of rectangle
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Add all sides
Per.= 2l + 2w |
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Perimeter of Triangle
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Add all sides.
Per = a + b + c |
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Area of Triangle
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Area = (1/2) ( b ) ( h )
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Area of Circle
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Area = (pi) (r) (r)
or (pi) times square of radius |
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Congruent Angles
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Two angles with the same measure
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Congruent Segments
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Two segments with equal lengths
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Radius of Circle
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Distance from the center to a point on the circle
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Diameter of Circle
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The length of a segment which has both endpoints on the circle AND which passes through the center (equal to 2 times a radius of the circle)
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Midpoint
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The point on a segment which is equidistant from each endpoint.
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Opposite Rays
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Two rays with a common endpoint which extend forever in opposite directions, forming a line.
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Postulate
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A statement of fact accepted to be true without proof
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Theorem
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A statement which is proven to be true, either as an example or as a problem to be done.
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Vertical Angles
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When two lines intersect at a point, the nonadjacent angles are called vertical angles.
Vertical angles are congruent |
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What are the three transformations
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Translation (slide) move but don't change orientation Reflection (flip) across either axis
Rotation (turn) about the origin (0,0) |
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image and preimage
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The preimage is the original shape, the image is the copy after transforming.
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Hypotenuse
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The longest side of a right triangle. It is across from the right angle
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Legs of right triangle
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The two shorter sides, they form the right angle with each other.
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