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.
It will have an L shape flipped around at the corner. or you can use a protractor or type in google images 'right angle triangle' they will have an L shape at the corner of the right angled triangle.
A protractor measures the degree of angles and circles.
A protractor is normally used to construct angles.
Use a protractor or use the formula: (n-2)*180 = sum of degrees whereas 'n' is the number of sides of the shape or polygon
A Protractor is a tool used to make circles.
A protractor is in the shape of a semi-circle and is used in maths to measure angles in shapes and on lines.
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
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.
A full protractor is is a protractor that goes 360 degrees around.
Contractor rhymes with protractor.