Answer:
Option D - 19.41
Step-by-step explanation:
To find the missing length of the right angle triangle where we need to find the value of x.
We make it into an equation form to solve.
(H)^2 =(P)^2 +(B)^2
We substitute the given values
(21)^2 = (8)^2 + B^2
441 = 64 + B^2
441 - 64 = B^2
377 = B^2
B = 19.41
