How do you find missing angles for supplementary and complimentary?
Supplementary angles add up to 180 degrees. Complimentary angles add up to 90 degrees. For example, pretend you’re trying to find the complimentary angle of 20. The other angle is equal to 5x-10. Add the two together and they should equal 90, but you must also solve for x. This would be your equation: 5x + 10 = 90 degrees – 10 -10 5x = 80 degrees /5 /5 x = 16 degrees Now you have x, so you can find your missing angle (5x-10) 5x-10 = 70 degrees = the missing angle. Add that to the angle you already know (20 degrees) and you should have 90. Hope that answers your question…
