Get all your supplies ready (pencil, paper, protractor, eraser and a ruler).
Start by having your ruler horizontally on your paper.
Draw a line around 3cm long.
There's your beautiful 3cm line.
Put a small dot on the middle of the line.
Place the middle line of your protractor on the dot of your line.
Whatever measure of an angle you are doing subtract it from 360. Let's say we are doing 250 degrees. Subtract and you get 110 . That's the angle we are drawing.
Put a dot at the 110 degree marker (or the angle measure you are doing).
Remove your protractor and you will see the 110 degree dot.
Use your ruler and connect the two dots with a line.
Use your protractor and check if the angle is the right measure (110).
If your angle is obtuse (in our case it is) erase the half of the line that is acute. It is the opposite if you have an acute angle.
This is what it should look like when you are done erasing.
Draw a curved line to mark of where the angle is.
There you go, your reflex angle! Measuring 250 degrees.
Everything after this is extra information on materials and concepts from my snapguide.
A ruler is flat stick that is either plastic, metal or wood. It is used to draw a straight line and to draw lines that measure a certain length.
A protractor is a tool used to draw or measure angles. Each mark on the protracter indicates a degree.
- A Ruler
- A Eraser
- A Protracter
- A Sharp Pencil
- A Sheet of Graph Paper