d)
C
B D
A
7 mm
39 mm
25 mm x
12.Calculatexandyin the diagrams below:
a)
65 ◦
x
b)
15 ◦^20 ◦
x
c)
15
25
2 x
x
y
d)
60 ◦
x
A
C
B
e)
3 x
A x B
C
Chapter 7. Euclidean geometry 275
d)
C
B D
A
7 mm
39 mm
25 mm x
12.Calculatexandyin the diagrams below:
a)
65 ◦
x
b)
15 ◦^20 ◦
x
c)
15
25
2 x
x
y
d)
60 ◦
x
A
C
B
e)
3 x
A x B
C
Chapter 7. Euclidean geometry 275