Question

After angleABD = angle CBD​

Answer 1

Answer:

2) angle a = angle b

a+x= 180° ( linear pair ) -1

b+y= 180° ( linear pair ) -2

a+x=b+y

a=b

a+x=a+y

a+x-a=y

x=y (alternate angles)

therefore, l||m

3) AB = 8cm

AM = BM ( M is the mid-point)

AB = AM + BM

AB= AM + AM

8= 2AM

8/2= AM

4= AM

therefore, AM = 4cm

4) From ∆ABD and ∆CBD

AD= CD ( Given )

AB= BC ( Given )

BD= BD. (Common)

therefore, ∆ ABD is = ∆CBD