Question

PLEASE HELP I was really sure that this would be 13 but it's not and I have no clue on what to do.​

Answer 1

11

Explanation:

Another way you can think is as

`(AD)/(AB) = (AD)/(2AD) = (1)/(2)`

Given D & E are mid points of AB & AC

So, DE must be parallel to BC

By the property of similar triangles

ADE ~ ABC

`(DE)/(BC) = (1)/(2) \\ (DE)/(22) = (1)/(2 ) \\ DE = (22)/(2) = 11`

Hope it helps too ;))

Answer 2

Answer: its 11

Explanation:

DE is similar to BF and BF is half the line of BC so half of 22 is 11