Question

question 17 plss ans tst tmrr

Answer 1

1)As we know that AB is / / to CD so AL is also // to CD.and DL is transversal.

The baseBE=EC (because E is mid point)
angle BLE=CDE (alternet interior angle)
angle DEC=BEL (vertically opposite angle)

Then both triangle EDC and EBL are congurent then DC = BL,AB=DC
so AB =BL. proved.

2) as both triangle are congutrent
so. AB=CD. and AB=BL (proved)
hence 2DC=AL proved.