8.3 Perimeter and Area

Question 1

Perimeter

Answer 1

The sum of the lengths of the aides of the figure

Question 2

Perimeter of a rectangle

Answer 2

P = 2l + 2w

Question 3

Area

Answer 3

The measure of the region within the boundaries of the figure

Question 4

Area of a rectangle

Answer 4

A = l (length) x w (width)

Question 5

Area of a square

Answer 5

A = s^2 (side squared)

Question 6

Area of a parallelogram

Answer 6

A = b (base) x h (height)

Question 7

Area of a triangle

Answer 7

A = 1/2b x h

Question 8

Area of a trapezoid

Answer 8

A = 1/2h(b1 + b2) (2 sides that are parallel)

Question 9

Pythagorean Theorem

Answer 9

The sum of the squares of the lengths of the legs of a right triangle equals the square of the length of the hypotenuse.
(leg^2 + leg^2 = hypotenuse^2)
(a^2 + b^2 = c^2)

Question 10

Circle

Answer 10

A set of points equidistant from a fixed point called the center.

Question 11

Radius (r)

Answer 11

A line segment from the center of the circle to any point of the circle

Question 12

Diameter (d)

Answer 12

A line segment that passes through the center of the circle and contains two endpoints of the circle

Question 13

Diameter (d)

Answer 13

A line segment that passes through the center of the circle and contains two endpoints of the circle

Question 14

Circumference

Answer 14

Distance around the circle

Question 15

Area of a circle

Answer 15

A = (pi)r^2

Question 16

Circumference of a circle

Answer 16

C = (pi) x d
C = 2 x (pi) x r

Question 17

1ft^2 to square inches

Answer 17

(1ft)^2 = (12in)^2
= 144 inches^2