ANGLES

• An angle is a combination of two rays (half-lines) with a common endpoint

EXAMPLES OF ANGLES

FACTS OF ANGLES

• The latter is known as the vertex of the angle and the rays as the sides, sometimes as the legs and sometimes the arms of the angle.

NONEXAMPLES

AREA

• Area is the quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in the plane.

PERIMETER

• Perimeter is the distance around a two dimensional shape, or the measurement of the distance around something; the length of the boundary.