n. a unit for measuring the size of an angle
The corner of a square is a 90 degree angle.

v. to touch and join with or cross something else
This is where three rivers meet.

n. the shape made when two lines come together
The angles of square are all right angles.

n. an area of land that is used for sports
The football player suddenly reversed his field.

v. to find out the size, length, or amount of
Click this to measure a distance or area size.

n. a math question to be solved
He solved this problem easily.

n. a tool that looks like a half circle and is used for drawing and measuring angles
She asks if she uses a protractor and compass in her drawing.

n. a length equal to ¹/100 meter
A millimeter is a tenth of a centimeter.