Center Marks

What is the purpose of center marks?

• To indicate the center of circles or arcs

• To mark the edges of a square

• To highlight the corners of a triangle

• To measure the length of a line.

Center marks are small marks used to indicate the (a)   of circles or arcs.

What is one of the purposes of center marks?

• To show the exact center of small circles and holes

• To indicate the color of a drawing

• To measure the weight of an object

• To erase pencil marks.

Center marks are used to _________.

• Indicate center points for measurement

• Show the color of a drawing

• Measure the weight of an object

• Erase pencil marks.

What is the correct angle at which lines should cross when drawing center marks?

• 45 degrees

• 60 degrees

• 90 degrees

• 120 degrees

Lines should be (a)   and light when drawing center marks.

What is the recommended length for marks in drawings according to the proper size guidelines?

• 1/16 inch to 1/8 inch

• 1/8 inch to 1/4 inch

• 1/4 inch to 1/2 inch

• 1/2 inch to 1 inch

According to the proper size guidelines, lines should extend slightly beyond (a)   edges.

Which of the following is a common mistake to avoid in drawing?

• Making marks too small

• Drawing freehand without straight edges

• Aligning lines at 45 degrees

• Making lines as bold as object lines.

Don't forget to align them perfectly at (a)   degrees.