math
posted by holiday .
i want to buy a tv set, but the entertainment center i have is 30 inches by 40 inches, what is the largest tv set i can buy

TV sets are measured according to their diagonal distance from one corner to the opposite. Therefore, I feel as though for this question it's simply asking you to find the distance from the one corner to the opposite. To do this you want to view this as a triangle rather than a square and you want to find the hypotenuse.
Recall: a^2 + b^2 = c^2
with a and b being the 2 sides and c being the hypotenuse.
30^2 + 40^2 = c^2
900 + 1600 = c^2
2500 = c^2
square root of 2500 = c
50 = c
Therefore the largest TV set you could buy is a 50 inch!
Respond to this Question
Similar Questions

Algebra
I have to explain how I might apply rational expression to my everyday life. I have to explain the application and discuss what the equation might be. Is this a good example? 
Math I have no idea how to do this PLZ HELP!
Josefina needs enough ribbon to make 90 bookmarks. Each bookmark is to be 5 and 7/9 inches long. Estimate how many yards of ribbon she should buy. (5+7/9)*90 450 + 70 520 inches ; divide by 36 Buy 15 yards. (5+7/9)*90 450 + 70 520 … 
geometry & measurement
jose wants to buy a new tv that will fit the opening of his entertainment center. the height of the opening in his entertainment center is 27 inches. usually, the opening of an entertainment center has a widthtoheight ratio of 4:3. … 
geometry
jose want to buy a tv for his entertainment center. the hieght of the opening is 27 inches. usually, the opening of an entertainment center has a widthtoheight ratio of 4:3 
Math
1) what is the length of the diagonal of a square whose sides are 3 inches long. A. 9 inches B. 3 square root 2 inches**** C. 6 inches D. 18 inches 2) which set of measure could be the side lengths of a right triangle? 
math
Gina is adding a lace border to a circular pillow. The radius of the pillow is 8 inches, and she needs to decide how much lace to buy. Which length represents the least amount she can buy? 
math i have no idea help please
DVDs are on sale for 12.50 for a set of two. You have $35. You can split a set and buy just one disc for the same price per disc as the set. how many disc can you buy? 
math
A television set is 36 inches wide and has a diagonal length of 42 inches. To the nearest inch, how tall is the set? 
Statistics
The distribution of heights of women aged 20 to 29 is approximately normal with a mean of 2.8 inches and standard deviation of 2.8 inches. The height (+/ 0.1 inch) of the middle 99.7% falls between a low of ? 
math
The diagonal of a TV set is 26 inches long. Its length is 14 inches more than the height. Find the dimensions of the TV set.