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

"Draw three-inch square. Draw lines AB, BC, DE and EF at 30 degrees. Divide lower side into seven equal…

This is an architectural tool, which facilitates the use of drawing straight lines and right angles,…

A T-square is a technical drawing instrument, primarily a guide for drawing horizontal lines on a drafting…

To fasten the paper, lay a sheet on the board with the left edge an inch or so from the ending, place…

"Through the center of the space draw a horizontal and a vertical line, measuring on these lines as…

Parallel lines are drawn by using a triangle in combination with a T-square. To draw a line parallel…

Parallel lines are drawn by holding the triangle against the T-square at an angle, or another triangle,…

Perpendicular lines are drawn by fitting the hypothenuse of the triangle to the T-square at an angle,…

When drawing vertical lines, the blade of the T-square is held with the thumb while the fingers adjusting…

All lines in a mechanical drawing are made with the aid of an instrument. Horizontal lines are drawn…

The Universal Drafting Machine is used in a large drafting room. It combines the functions of T-square,…

A problem exercise to construct a star overlapping square using a triangle and T square. The image is…

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…

This folding square is also known as a t-square which is a technical instrument, primarily a guide for…

"Where the square has a fast and a loose head, the blade should be mortised into the fixed one and the…

A front and side view of a t square with rectangular head. The t square is used draw straight lines…

"To enable the drawing of long parallel, the head must have been a long contact surface with the edge…

"Where the head is movable, the pivot should be quit large, and the hole in which it plays be bushed…

T-squares is used on the left side of the board for righted handed people, and right side of the board…

An adjustable T-square to create straight lines at different angles with a ruler attached to the head.

A T-shaped ruler, used primarily in mechanical drawing, having a short crosspiece that slides along…

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 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…

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