Question

in the given figure l//m//n . find (x+y):(x-y)​

Answer 1

Are you in DPS ,bhilai ??

Answer 2

-21/5

Step-by-step explanation:

To find x;

100⁰ + x = 180⁰

[sum of adjacent angles of a //gm is 180⁰]

x = 180 -100

x = 80⁰

To find y;

30⁰ + y + 20⁰ = 180⁰ [three angles are present on

a straight line ]

y + 50⁰ = 180⁰

y = 180 -50

y = 130⁰

Hence, x = 80⁰ and y = 130⁰.

Now to find (x+y):(x-y);

$\frac{80 + 130}{80 - 130} \\ = > \frac{210 }{ - 50} \\ = > - \frac{21}{5} (required \: answer)$