$r^2=x^2\ +y^2$  
This is the equation of:

Look at the image and calculate the value of h

Given the following pattern: 3,7,11,15, X

What is the value of x?

 $\frac{3}{7}$  

What is the denominator from the given fraction?

 $\frac{1}{2}$  
The given fraction is equivalent to:

0.21595846246262

This number is an example of a __________________.

_{From Sir Shaun:}

What was difficult for you to answer?