Question

Please help me !!!!

Answer 1

<7 = 180 - <6 (Liner Pair)

= 180 - (3y+20)

= 180 - (60+20)

= 180 - 80

= 100°

<8 = <6 ( Verticaly opposite angles)

= 60 +20

= 80°

Answer 2

HELLO DEAR,

line L || m and line "n" is TRANSVERSAL

<4= <6 [ alternate interior]


=> x+2y=3y+20

=> x-y = 20

=> x -y = 20 -----------(1)



<1+<4 =180° [straight line]

=> 2x+y+x+2y =180°

=> 3x+3y =180°

=> x+y =60°------------(1)

from--(1) and--(2)

we get,

x-y =20
x+y =60
--------------
2x =80

x=40° put in --(1)

we get,

40-y =20

y =40-20

=> y = 20°




<6 =(3×20+20) = (60°+20°) =80°



<7 + <6 =180° [ angles of straight lines]

=> <7 =180°-80°

=> <7 =100°

and <6 = <8 [vertically apposi.]

<8 =80°



I HOPE ITS HELP YOU DEAR,
THANKS