2 Answers

GoWithSwagger · Answer 1 · 2019-10-09T04:02:53+0000

B. 9 I think because it looks like it is bisected in the middle to cut into two equal parts. Please correct me if I am wrong. Thanks.

Funilrys · Answer 2 · 2019-10-15T15:04:44+0000

we know that

A median of a triangle is a line segment joining a vertex to the midpoint of the opposing side, bisecting it.

In this problem the line DB is a median of triangle ADC

The line DB is also the altitude of a triangle ADC, because is perpendicular to the side AC

so

AB=BC

we have that

$BC=9\ units$

therefore

$AB=9\ units$

the answer is the option

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