CPhill

The perimeter is given by :

4 * √[9^2 + 6^2 ] =

4 √117   ft.

Here is what Melody is describing....it's known as the  "complex" plane....

The length of the longer diagonal will be given by :

2 * √[51^2 - 24^2]

Just set each equation equal to its opposite side and solve......!!!!

A₁ is 5cm on a side and A₂ is 7cm on a side......

So  ...   A₃ = 5 x 7 = 35 sq cm 

(0, -7) 

(2, -1)

(5,  8)

(6, 11)

The slope between succssive points is 3

The y intercept is -7

So....the rule is:

y = 3x - 7

$4635.21(1+.08/12)^12*5   =  $ 25099.65

Area of ABC =  (1/2)(BC)(AD) =

(1/2)(3.5 )(3.5)  ≈ 6.125 sq cm

Here's a pic.......

1/3*pi*2^2*sqrt(10^2-2^2) =

(1/3) * pi * 4 * √[100 - 4 ] =

(1/3) * pi * 4 * √[96] = 

(1/3) * pi * 4 * 4 √6 =

(16/3) * pi *  √6  =

about  ....   41.042