Question

Find for x in cm..... .​

Answer 1

by vertically oppoest angles

30+40+a=180( angle sum propert)

a=70-180= 110

so in another triangle it was 110 by vertically oop angle

Know

x+4+110=180(angle sum propety)

x+114=180

x=180-114=66

x=66

hence proved