Please answer my question I will mark BRAINLIEST
With explanation please of all

See below ↓

Step-by-step explanation:

11)

AB = AC [as angles opposing them are equal]AB = 4 cmB is the answer

12)

x/2 = 9/3 [they are in proportion across the transversal]x = 2 x 3x = 6C is the answer

13)

Let the missing side lengths (which are equal) be xx² + x² = (2√2)²2x² = 8x² = 4x = 2 [length is always positive]A is the answer

There is a rule on which states you can only answer 3 questions maximum per post.

So I can only help with you this much.

Hope this helped~