Question

find x in the figure shown alongside.

please give answer with method ​

Answer 1

Answer:

The answer is 80°.

The step-by-step explanation:

Please refer to picture for diagram.

• First we need to find angle DCB and we can find that out by the property of 'angles on straight line'
• $angle \: dcb = 180 - 120 = 60$
• After finding angle DCB we can find the third angle of ∆DCB by using the property 'angle sum of ∆':
• $angle \: bdc \: = 180 - 60 - 40 = 80$
• Now we have found the answer! By referring to the property of alternate angles we can see that DC // AB. Thus, angle CDB = angle ABD. x=80

Answer 2

Answer:

find angle DCB

angle DCB equal to 180 - 120 equal 60

now we find angle bdc

angle bdc equal to 180 - 60 - 40 = 80

so , DC parallel ab

angle c d be equal angle a BD

So, answer of angle x=80 degree