You have to find the supplement of each angle given to find the angles within the triangle. 180-90 = 90 and 180-125= 55. You then add those two numbers to get 145, and since the angles of a triangle add up to 180, you subtract 145 from 180 to get the answer, 35 degrees
Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.