Constructions, loci and three-figure bearings

1

What are perpendicular lines?

2

What is a bisector?

3

What is 'the path of a point that moves according to a certain rule'?

4

Which mathematical apparatus, in addition to a pencil and ruler, is needed to find the midpoint of a line segment?

5

How many arcs do you need to draw when constructing a perpendicular to a line through a point on the line or above it?

6

What is the minimum number of arcs needed to construct an angle bisector correctly?

7

What is the locus of a point that's {6}~{cm} from a fixed point?

8

What is the locus of a point that's further than {2}~{cm} from a fixed point and less than {6}~{cm} from the same point?

9

What does this construction represent?

Perpendicular point on a line diagram

10

What does this construction represent?

Perpendicular point to a line diagram