Look at this diagram. If HJ and KM are parallel lines and m<MLI = 120°, what is m<KLN?

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So first we need to find the area of both using a=3.14*radius*radius

to find the radius we need to divide 35 by 2 (large) and 30 by 2 (medium)

lets do the large first since the raidus is 17.5 we put it into a=3.14*17.5*17.5

and then we get 961.63, for the medium we do a=3.14*15*15 which is 706.50

now for the large 961.63 * 2 is 1923.26 and the price is 19.99 

for the medium we do 706.50 *  3 which is 2119.5 and costs 24.99

So the medium pizzas are a better deal