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.
A protractor is any of several devices used to either define an angle or curve, or to draw an angle, curve, or shape.
usage shape and units at initial stage
It is a protractor
A protractor
Not usually. It is mostly made of plastic.
Protractor
The semi-circle ruler is commonly known as a protractor. A protractor is a geometric tool used to measure and draw angles. It typically has a half-circle shape with degree markings along the curved edge.
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.