Question

3. find the value of x and the remaining angles if AB ll CD.
this is the question of Math chapter name lines and angles of standard 7 ​

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

a) lineAB ll lineCD and line EF is a transversal.

/ BXY+/ XYD=180............... interior angles

3x+10+2x=180

5x+10=180

5x=180-10

5x=170

x=170/5

x=34

b) lineAB ll lineCD and line EF is a transversal.

/AXE =/CYX................... corresponding angles

/CYX=3x+13

/CYX+/CYF=180.....................angles in linear pair

3x+13+5x+7=108

8x+20=180

8x=180-20

8x=160

x=160/8

x=20