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# Geometry Chapter 6

TermDefinition
diagonal segment of a polygon that joins 2 non-consecutive vertices
formula to find the interior angle sum of a polygon (n-2)180
formula to find one interior angle of a regular polygon (n-2)180/2
exterior angles of a polygon always have a sum of 360
formula to find one exterior angle of a regular polygon 360/n
parallelogram quadrilateral whose opposite sides are parallel
parallelogram properties opposite sides are congruent, opposite angles are congruent, consecutive angles are suppl, bisecting diagonals, 1 pair of ≅ and // opp sides
ways to prove a shape is a parallelogram distance (opp sides ≅), slope (opp sides //), midpoint (diagonals bisect)
rectangle parallelogram with 4 right angles
rectangle properties has ≅ diagonals and other parallelogram properties
rhombus parallelogram with 4 ≅ sides
rhombus properties perpendicular diagonals, diagonals bisect angles, and other parallelogram properties
square rectangle, rhombus, and parallelogram combined
square properties ≅ diagonals, perpendicular diagonals, diagonals bisect angles, and other parallelogram properties
kite properties perpendicular diagonals, 2 ≅ short sides, 2 ≅ lone sides, 1 pair ≅ opposite angles (obtuse)
trapezoid quadrilateral with exactly 1 pair of parallel opposite sides
midsegment segment that joins the two midpoints of the legs, parallel to bases, length is the average of base lengths
formula to find the midsegment base 1 + base 2/2
isosceles trapezoids have ≅ legs, have ≅ base angles, have ≅ diagonals
Created by: ts2819
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