If x,y, and z were the angles of triangle such that x=2y and y= z-20 degrees, how many degrees are there in angle x?
2 Answers
May 16, 2018
Explanation:
May 16, 2018
Explanation:
#"the 3 angles sum to "180^@#
#rArrx+y+z=180#
#rArr2y+z-20+z=180#
#"to solve we require an equation in 1 variable"#
#y=z-20rArrz=y+20#
#"expressing as an equation in y"#
#rArr2y+(y+20-20)+(y+20)=180#
#rArr4y+20=180#
#rArr4y=180-20=160#
#rArry=160/4=40#
#rArranglex=2xx40=80^@#