A Protractor is a tool used to make circles.
Semicircular
A protractor is in the shape of a semi-circle and is used in maths to measure angles in shapes and on lines.
A protractor is any of several devices used to either define an angle or curve, or to draw an angle, curve, or shape.
It is a protractor
Protractor
A protractor is the common tool used in mathematics for measuring and drawing angles.
A protractor is in the shape of a semi-circle and is used in maths to measure angles in shapes and on lines.
Most of the protractors I've seen have been in the shape of a semicircle.
Use a protractor
Use a protractor.
usage shape and units at initial stage
A protractor is any of several devices used to either define an angle or curve, or to draw an angle, curve, or shape.
A protractor
It is a protractor
Not usually. It is mostly made of plastic.
Protractor
A protractor is a shape: semi-circle or full circle, that has degrees marked around the edge. Place the marked centre of the protractor on (for example) the corner of two lines forming a right-angle. The bottom line will be zero, while the vertical line will cross the 90 degrees mark of the protractor, so proving that a right-angle is 90 degrees.
who invented the protractor?