To represent the center of round, cylindrical features, or the symmetry of a feature.

• Center line

• Phantom line

• Break line

• Stich line

• T-square

• divider

• Adjustable triagle

• compass

Which figure is the correct position of pencil and hands when drawing horizontal lines

• a)

• b)

• C)

• all of the above

Shows where a part is mentally cut in half to better see the interior detail.

• Invisible line

• Cutting plane line

• Center line

• Phantom line

It's main purpose is to reproduce dimensions full of size on throwing or to reduce or enlarge them.

• Triangular Scale

• T-square

• Adjustable Triangle

• compass

Used to break the edge or surface of a part for clarity of a hidden surface.

• Long break line

• Cylindrical break line

• Short break line

• Center line

Use to protect workbenches and table tops in cutting materials

• drawing board

• illustration board

• place mat

• cutting mat

Shows the outline of a feature that cannot be seen in a particular view

• Hidden line

• Visible line

• Extension line

• Short Break line

to smudge or blend marks

• easel

• graphite pencil

• stump

• chalk

They Indicate length/ measurments.

• Extension line

• Stitch line

• Ditto line

• Dimension line