MPM1D
7.2 Angle Relationships in Quadrilaterals
Quadrilateral: A closed 4 sided polygon (shape or figure)
w
a
x b
The sum of the interior angles is 3600
d z
c
y
Therefore: a + b + c + d = 3600
The sum of the exterior angles is 3600
Therefore: x + y + z + w = 3600
Ex.1: Find the missing angles:
a)
b)
a
800
1210
1160
z
c)
d)
u
w
x
y
7.2 Assignment: p.381 #1, 5-7, 11 (for #11 "mean" = "average")
#12(For #12a find x, for 12b find y), #13
1