Illustration showing the correct and incorrect position of a right line pen against a T-square, triangle, or straight edge when doing geometric constructions.

Positioning Pen for Constructions

Illustration showing the correct and incorrect position of a right line pen against a T-square, triangle,…

The construction of a star with square overlapping each other using a triangle and T square. This image is drawn by dividing the paper with dashed lines using T square. Using the 45 degree triangle, draw diagonal lines to create the star and the star.

Constructing Star and Box Overlap Pattern using T Square and Triangle

The construction of a star with square overlapping each other using a triangle and T square. This image…

A diagonal line pattern drawing exercise in for T square and triangle. The image is constructed by dividing the paper into squares with the T square, and the diagonal lines are drawn using a 45 degree triangle.

Drawing Exercise for Drawing Diagonal Line Pattern using T Square and Triangle

A diagonal line pattern drawing exercise in for T square and triangle. The image is constructed by dividing…

An English T-square for drawing straight lines. The narrowing of the bottom blade makes the T-square look as if it is not perpendicular.

English T-square

An English T-square for drawing straight lines. The narrowing of the bottom blade makes the T-square…

A long fixed head T-square for drawing straight lines. The head shape of the T-square allows for drawing a long square.

Long Fixed Head T-square

A long fixed head T-square for drawing straight lines. The head shape of the T-square allows for drawing…

A regular fixed head T-square for drawing straight lines. The blade must be perfectly straight in order to draw accurate lines.

Regular Fixed Head T-square

A regular fixed head T-square for drawing straight lines. The blade must be perfectly straight in order…

T—squares can be temporarily adjusted by putting the thumb tack in the head as illustrated. This is used when the previous work does not align with the T-square.

Temporary Adjustment T-square

T—squares can be temporarily adjusted by putting the thumb tack in the head as illustrated. This…

A test to ensure the triangle is accurate by drawing a perpendicular line from a T-square.

Triangle Accuracy Test using T-square

A test to ensure the triangle is accurate by drawing a perpendicular line from a T-square.