4 Samir is a roofer. Here is a section of a roof made from straight pieces of wood.
Pitch
Angle o
D
12
45
11
42.5
10
40
DO NOT WRITE IN THIS AREA
9
37
8.
33.75
7
30
А
6
26.5
B.
С
5
22.5
Samir knows that
4
18.5
3
14
2
9.5
the shaded triangle is an equilateral triangle
the line DB is a line of symmetry
the line ABC is a straight line
the size of the angle marked xº indicates the pitch of the roof.
The table shows information about the pitch and angle of a roof.
1
4.5
0
0
TE IN THIS AREA
Find the value of x and use the table to give the pitch of the roof.​