Question

what is the answer please thanks

Answer 1

refer the attachment

Answer 2

Hey!!!...Here is ur answer

Since it forms right angle triangles..so Applying pythagoros theorem.

$b = \sqrt{ {4}^{2} - {3}^{2} } \\ \\ b = \sqrt{16 - 9} \\ \\ b = \sqrt{7}$

Hope it will help you