Question

help pls i need this now

Answer 1

Answer:

3.14

Step-by-step explanation:

Formula: $b= \sqrt{c^2-a^2}$

b= $\sqrt{2.1^2-1.4^2}$

b = $\sqrt{2.45}$

b = 1.57

To get x you need to double b which is

3.14