The interior angles formed by the sides of a quadrilateral have measures that sum to 360°. What is the measure of angle A?

https://snag.gy/FkeA9Q.jpg

hoiuu Feb 8, 2019

#1**0 **

Add them all together and equate to 360 (as stated in the Question)....then solve for x and calculate A....

try to do this yourself, post here if you need more help!

ElectricPavlov Feb 8, 2019

#2

#3**0 **

Not sure where you went off-course....add them all together and equate to 360:

(3x-6) + 2x + 108 + 88 = 360 gather 'like terms'

3x + 2x + (108+88-6) = 360 simplify

5 x + 190 = 360 subtract 190 from each side of the equation

5x = 170

x = 34

Angle A is shown as 3 x - 6 3 (34) - 6 = 96 degrees

ElectricPavlov
Feb 8, 2019

#4**+1 **

Oh i did it like this

3x-6+2x+88+108=360

solved and got 34

then i substituted x for 34 in the A equation

3+34-6 and got 31..

hoiuu Feb 8, 2019

#5**0 **

Auugh.... do you see where you got off-course! Your boat is now stuck on the reef doing tremendous damage !

it is 3 ** * ** x -6 ** not ** 3 **+ **x -6

ElectricPavlov
Feb 8, 2019