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Published bySarah Barnett Modified over 7 years ago
6.6 Special Quadrilaterals
Example Quad ABCD has at least one pair of opp sides What kinds of quads could it be? Parallelogram Rhombus Rectangle Square Isosceles Trapezoid
ABCD has at least 2 consecutive sides, What quads meet this condition? Square Kite Rhombus
The coordinates of ABCD are A(-2,5), B(1,8) C(4,5) D(1,2). Show that ABCD is a rhombus. 1 way: use Distance formula AB= BC= CD= DA= All four sides , so it is a rhombus.
Example cont. Another way: use Slope Formula m of seg AB= m of seg CD= m of seg BC= m of seg DA = Opp sides are ll, so it is a parallelogram. Now show that the diags are to prove it’s a rhombus.
Example cont. Check slope of diags. m of seg AC= m of seg BD = Diagonals are , so it’s a rhombus. ** This shape is also a square!
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