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22 Cards in this Set
- Front
- Back
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quadrilateral
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a figure with four sides, four vertices, and four angles
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convex quadrilateral
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a quadrilateral wherein the angles are all less than 180 degrees
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concave quadrilaterals
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a quadrilateral wherein some of the interior angles are greater than 180 degrees
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diagonals
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lines connecting the opposite vertices of a quadrilateral
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trapezoid
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a quadrilateral in which two sides are parallel
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bases
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the parallel sides of a trapezoid
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legs
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the non-parallel sides of a trapezoid
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median of a trapezoid
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the segment that connects the midpoint of the legs
average of the lengths of both bases |
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area of a trapezoid
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height of the trapezoid x length of the median of the trapezoid
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isosceles trapezoid
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base angles come in two pairs of equal angles
legs are equal diagonals are equal |
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parallelogram
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a quadrilateral wherein both pairs of opposite sides are parallel
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area of a parallelogram
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base x height
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rhomus
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a quadrilateral in which all sides are equal. a type of parallelogram.
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area of a rhombus
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half the product of the diagonals
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rectangle
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a quadrilateral wherein all the angles are equal
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the diagonals of a rectangle are...
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equal to each other and equal to the square root of the sum of the squares of the length and the width of the rectangle
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square
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a quadrilateral wherein all the sides and angles are equal
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diagonal of a square =
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side x root 2
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exterior angles
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angles formed by extending the sides of a polygon
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the measure of each interior angle of an n-gon is...
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180(n-2)/n
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the measure of each exterior angle in an n-gon is...
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360/n
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area of a regular polygon =
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1/2 its perimeter times the distance from the center of the polygon to a side
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