Which of the following equations could be used to find the missing measurement in this triangle?

a2 + 352 = 372
352 + 372 = a2
a2 + 372 = 352

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

50 points~ ! i have to turn this in tomarrow

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?