#1**+3 **

Add all of the measurements....they have to total 360 degrees....solve for 'x'

9x-22 +61+5x-7+34 = 360 does that help?

ElectricPavlov Sep 12, 2019

#2**+3 **

Yes, but on number 10 I come out with a decimal. Is it suppose to be a decimal?

Masterx4020
Sep 12, 2019

#3**+4 **

Let's see

12x +2x+5 + 17x-14 + 90 = 360

31x -9+90

31x+81

31x = 360-81

31x=279

x =9 Nope! Better check your math......

ElectricPavlov
Sep 12, 2019

#4**+1 **

10.

Note that the measure of minor arc AB = 90

(2x + 5) + (17x - 14) + 12x = 360 - measure of arc AB

31x - 9 = 360 - 90

31x - 9 = 270 add 9 to both sides

31x = 279 divide both sides by 31

x = 9

arc AD = 12x = 12*9 = 108°

arc BC = 2x + 5 = 2*9 + 5 = 23°

arc DC = 17x - 14 = 17*9 - 14 = 139°

arc DBC = 12x + 90 + (2x + 5) = 108 + 90 + 23 = 221°

CPhill Sep 13, 2019