Help it is math i need help pls pls pls pls

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

Acircle has a circumference of 7.850 units. what is its radius?

Which of the following shows the length of the third side, in inches, of the triangle below