The greatest common factor is 6.
30 = 6 x 5
78 = 6 x 13
90 = 6 x 15
180 = 6 x 30
Finding common factors (2 x 3 = 6)
30 = 2 x 3 x 5
78 = 2 x 3 x 13
90 = 2 x 3 x 3 x 5
180 = 2 x 2 x 3 x 3 x 5
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The greatest common factor (GCF) of 180 and 450 is the largest number that divides both 180 and 450 without leaving a remainder. To find the GCF, you can list the factors of each number and identify the largest factor they have in common. The factors of 180 are 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, and 180. The factors of 450 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 30, 45, 50, 75, 90, 150, and 450. The GCF of 180 and 450 is 90.
The greatest common factor (GCF) of 15, 30, 90 is 15.
90+x+72+30 = 180. If you add 90+72+30, you get 192. But to get 180 you have to subtract 12. 90+(-12)+72+30 =180 if x is -12
78 is an acute angle as it is less than 90, 144 is an obtuse angles as it is between 90 and 180