Help me and I will give u brain..................

Step-by-step explanation:

so first the triangle on the left has 90 degrees and 45 degrees. this means the third missing angle is 45 degrees, making it an isosceles triangle

keep in mind that the 2 side lengths (not hypotenuse are the same)

use Pythagorean theorem

and a=b because the lengths are equal

so

40.5=

a=

the triangle on the right is a 30 60 90 triangle

thus its side lengths are in a special ratio, see screenshot attached

is between 90 and 30 degrees so it is where a is common factor

find a

not negative because in context this is geometry there are no negative lengths

so a=

x in this 30 60 90 triangle is 2a

so

which is equal to

please mark brainleist lol

hope this helps !! gl