AREA VOCABULARY

AREA OF A RECTANGLE

• To find the area of a rectangle, you have to multiply the width by the height.

AREA OF A PARALLELOGRAM

• To find the area of a parallelogram, you have to multiply the base by the vertical height.

AREA OF A TRIANGLE

• To find the area of a triangle, you take half of the base and height and multiply it by the measures of the base and height.

AREA OF RHOMBUS OR KITE

• The areas of a rhombus or a kite are equal to the halves of their diagonals.
• Half multiplies by one diagonal multiplied by the other.

RADIUS

• A radius is the length of any shape.
• A real life example of a radius is the bone in your arm, and also any lengths of furniture or rooms.

DIAMETER

• Diameter is the length of a segment in a shape.
• An example of this in reality, is the equator across the earth.

APOTHEM

• The apothem of a polygon is the distance from the center to the side.
• These are seen in real life often, if you are in the center of a pool, the apothem is the length from you to the side.

AREA OF A REGULAR POLYGON

• You find the area of a regular polygon by multiplying half by the apothem and the perimeter.

MINOR ARC

• An arc that is smaller than a semicircle.

MAJOR ARC

• An arc that is larger than a semicircle.
• An example of this is a rainbow.

CIRCUMFERENCE

• Distance around the circle.
• Distance around the perimeter of the earth.

ARC LENGTH

• The product of the ratio measure of the arc over 360 degrees and circumference of circle.

AREA OF A CIRCLE

• To find the area of a circle, you multiply pi by radius squared.

AREA OF A SECTOR

• To find the area of a sector, you multiply half by radius squared by angle of radians.