I'm confused on how to solve the triangle. can someone me ?

b = 10.28542658

Step-by-step explanation:

This is a right triangle, so we can use the Pythagorean theorem

a^2 +b^2 =c^2

The legs are a and b and the hypotenuse is c

We know one of the legs and the hypotenuse

3.9^2 + b^2 = 11^2

15.21 + b^2 = 121

Subtract 15.21 from each side

15.21-15.21 + b^2 = 121-15.21

b^2 = 105.79

Take the square root of each side

sqrt(b^2) = sqrt(105.79)

b = 10.28542658

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

u also answered this so i think u would know but i am here to

put in or use mine