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the other angle has to be 120 degrees, so that both angles add up to 180 degrees.
If it's an isosceles triangle and the apex angle is 70 degrees then the base angles will each measure 55 degrees
Angle and its complement have a sum of 90 degrees: A+C = 90 Angle plus five times its complement is 298 degrees: A+5C = 298 Subtract first equation from the second: 4C = 208 C = 52 So, the complement is 52 degrees and the angle is 38 degrees
You can enter it in Excel as 6E15 (the number has 15 0s. The scientific notation for the number is 6*1015 but to enter that in Excel you have to enter "=" first, and the exponent, 15, is preceded by ^. So the whole string that you need to enter is "=6*10^15"
Any angle (in standard position) between zero and 90 degrees is in the first quadrant.