G
B
D E C F
75°
123° x°
Diagram NOT
accurately drawn
A
ABC, DECF and EBG are straight lines.
Work out the value of x.
Give a reason for each stage of your working.
x =
112°E C
D
I
J
K
A B
F
G
H
112°
84°
x°
Diagram NOT
accurately drawn
Pentagon ABCDE is drawn inside the regular octagon ABFGHIJK.
The pentagon has exactly one line of symmetry.
Work out the value of x.
x =