Question

in the figure abcd is a rhombus ,then find y-x.​

Answer 1

Step-by-step explanation:

according to picture

angle DCO= angle OAB= x

angle CDO=40°

angle COB=angle DOA= y

so

angle DOC=180-y

in triangle DOC

40+180-y+x=180

40-y+x=0

40=y-x

so

y-x=40

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