8TH WEEK
ANGLES
Properties
1. Alternate angles sides are equal
2. Corresponding angles are equal
3. Vertically opposite angles are equal
4. Adjacent angles are not equal (sum up to 180 )
70 b c
a
d 55
f
a = e (corresponding angles)
a = d (vertically opposite angles)
b = c 180 (adjacent angles).
55 e
a= 55 (vertically opposite angles)
e= 55 (alternate angle)
c= 180 - 70 = 110 (adjacent angle)
f= 70 (corresponding angle).
ASSIGNMENT
1. Find the missing angles and state your reasons.
Y
80
75
a
m
x
b
55
N