Area & Perimeter Formulas - chapter 10

Question 1

The area of a parallelogram with base b and height h is ….

Answer 1

A = bh

Question 2

The area of a triangle with base b and height h is ….

Answer 2

A = (1/2)bh

Question 3

The area of a trapezoid with bases b1 and b2 and height h is ….

Answer 3

A = (1/2)(b1 + b2)(h)

Question 4

The area of a rhombus with diagonals d1 and d2 is ….

Answer 4

A = (1/2)d1d2

Question 5

The area of a kite with diagonals d1 and d2 is ….

Answer 5

A = (1/2)d1d2

Question 6

The circumference of a circle with radius r is ….

Answer 6

C = 2pir or pi*d

Question 7

The area of a circle with radius r is ….

Answer 7

pi*r^2

Question 8

The area of a regular polygon with apothem a and perimeter p is ….

Answer 8

A = (1/2)ap

Question 9

When all of the dimensions of a figure are changed proportionally by a factor of k, then the perimeter or circumference changes by a factor of …. (a), the area changes by a factor of …. (b), and the volume changes by a factor of …. (c)

Answer 9

(a) k
(b) k^2
(c) k^3