Lesson 5.05 KEY
Main Idea (page #)
DEFINITION OR SUMMARY
Congruent Quadrilaterals
(P1)
Two quadrilaterals are congruent if all
corresponding segments are CONGRUENT in
length.
Similar Quadrilaterals (P4)
Two quadrilaterals are similar if all corresponding
segments are PROPORTIONAL to one another.
EXAMPLE or DRAWING
Lesson 5.05 KEY
Distance Formula
Used to determine if quadrilaterals are SIMILAR or
CONGRUENT.
Sqrt[(x2-x1)^2+(y2-y1)^2]
Are these rhombi congruent? Remember that a rhombus has
all 4 sides equal. We just need to check ONE side for each
figure to see if the two figures are congruent…..
Distance AB = √(8-5)2 + (7-9)2
= √(3)2 + (-2)2
= √9 + 4
= √13
Distance EH = √(9-5)2 + (2-3)2
= √(4)2 + (-1)2
=√16 + 1
= √17
YES or NO
Lesson 5.05 KEY
Watch the video! (P5)
ORDER matters when identifying corresponding
segments and writing the ratios of similar
quadrilaterals.
Parallelogram ABCD is similar to Parallelogram EFGH.