How To Draw 15 Degree With Set Square

Rulers are a length of woods, metallic or plastic with a straight edge for you to depict straight lines betwixt points and angles. You can also apply them to measure the distance between points.

There are several kinds of rulers that are used to produce manual drawings. These include: T-squares; set squares; adaptable prepare squares; protractors and scale rules.

T-squares

T-squares are oftentimes used to depict horizontal lines and, together with fix squares, to depict vertical lines.

The head of the T-square should exist on the left side of the board for right handed people and on the right side of the board for left handed people.

Modern cartoon boards may be fitted with a sliding straight border or parallel line, which is easier to operate than a T-square.

T-squares

Care and maintenance:

Take care not to harm the ruling border of the T-square.
Dents volition make information technology unusable.
E'er clean the T-square before use.
Don't employ the T-square as a hammer - or an axe!
Don't permit the T-square fall on the floor.

Prepare squares

There are a number of different set squares and they are used to describe vertical lines and angles.

The two common set squares are the 45° and the 60°-30° fix square.

These are used with the T-square to draw many common angles, providing that the angles are multiples of 15°. They are as well used to draw parallel and perpendicular lines.

Set squares

Care and maintenance:

E'er clean your set square before use.
Don't curve the fix square, information technology may break.
Don't scratch or mark the set square.

Adaptable set squares

The adjustable set foursquare tin can be gear up to a specific angle.

Like the common set square, this can exist used with the T-foursquare or parallel line to construct angles greater than ninety° also equally parallel or perpendicular lines.

Adjustable set square

Protractors

A protractor, or half circle, is used for measuring or setting off angles other than those obtainable with the triangles.

Information technology is divided into 180 equal parts. Each division is one degree.

Protractor

Calibration rule

In most cases the object that is to exist fatigued is also large to fit onto the paper available.

The drawing can be scaled downwardly using a calibration rule to allow it to exist drawn on newspaper.

The scale tells you how many times smaller, or bigger, the drawing is compared to the finished product.

This allows the actual dimensions of the full size article to be entered on the drawing.

The calibration rule is a rule with unlike combinations of calibration ratios that meet drawing standards. They are available in scales of 1:2, 1:5, 1:10, 1:20 and 1:100.

Scale conversion nautical chart
1:5	1:10	1:20
1mm = 5mm	1mm = 10mm	1mm = 20mm
2mm = 10mm	2mm = 20mm	2mm = 40mm
10mm = 50mm	10mm = 100mm	10mm = 200mm
20mm = 100mm	20mm = 200mm	20mm = 400mm

Scale rule