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# 8-4 Rectangles

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## Yailine Barajas

on 11 February 2014

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#### Transcript of 8-4 Rectangles

If the diagonals of a parallelogram are congruent, then the parallelogram is a rectangle.
Theorem 8.14
If a parallelogram is a rectangle, then the diagonals are congruent.
Theorem 8.13
What is a Rectangle?
A Rectangle is a quadrilateral with four Right Angles.
8-4 Rectangles
Abbreviation: If☐ is a rectangle, diag. are
Abbreviation: If diagonals of are , is a rectangle.

A B
D C
AC BD
Properties Examples
Oppisite sides are and

ll

Oppisite
L
's are

Consecutive
L
's are
supplementary.

Diagonals are and
Bisect each other.

All four
L
's are
Right

L
's
AB DC, AB
ll
DC
ll
L
A
L
C
L
B
L
D
m
L
A + m
L
B= 180
m
L
B + m
L
C= 180
m
L
C + m
L
D= 180
m
L
D + m
L
A= 180
AC and BD
bisect
each other.
AC BD
m
L
DAB= m
L
BCD=
m
L
ABC= m
L