Answer:
-
Explanation:
1.
a) Triangles sum of angles = 180 , so 118 + 27 +x =180 , x = 35 degree
b) ( 180 -115 ) + 90 + a =180 , a= 25 , 25 +x =180 , x=155 degree
c) x= 70 degree since we have parallel lines
d) (180 -70) +3x +4x =180
110+7x = 180 ⇒ 7x =70 , x= 10
2.
a) x= 70 degree , opposing each other , 35 + 70 + y =180 , y =75 degree
b) x = 180 -100 = 80 degree, 180 = 100+25 + y -> y =55 degree
c) 92 +45 +x = 180 , x=43 degree
45 +43 + y =180 , y = 92 degree
d ) 45 +x = 90 , x=45 degree
30 + 45 + y =180 , y= 105 degree