ANSWER: 11cm
Square root of 121 is 11
So
A= L x W
A = 11 x 11
A = 121 cam 2
Answer:
(a) 
(b) 
(c) Answer of part a is equation of line
which is parallel to y axis and in part by equation of line is
which is parallel to x axis
Step-by-step explanation:
We have given points are 
(a) Equation of line is given x = -9
We have to find the equation of line parallel to x= -9 and passing through 
x = -9 line is parallel to y axis and so slope will be infinite
Equation of line is given by 
So 

(b) Equation of line is given 
This line is parallel to x axis so slope will be zero
So equation of line will be 

(c) Answer of part a is equation of line
which is parallel to y axis and in part by equation of line is
which is parallel to x axis
The formula for Pythagorean Theorem is a^2 + b^2 = c^2, in which a and b is the leg and c is the longest leg.
http://www.jiskha.com/display.cgi?id=1358210190
this will help you
Associative property of addition