Question

This is so confusing all of it makes no sense

Answer 1

D).

Explanation:

Answer 2

D).
`4√(2)`

Explanation:

STEP 1a: Find the last angle of the triangle. ( which is angle A)

`A+90+45=180`

STEP 1b: Solve the equation for A by adding 90 and 45.

`A+135=180`

STEP 1c: Then Move all terms not containing A to the right side of the equation by subtracting 135 from both sides of the equation

`A=180-135`

STEP 1d: Subtract 135 from 180.

`A=45`

STEP 2a: Find side b next.

STEP 2b: The cosine of an angle is equal to the ratio of the adjacent side to the hypotenuse.

`cos(A)=(adj)/(hyp)`

STEP 2c: Substitute the name of each side into the definition of the cosine function.

`cos(A)=(b)/(c)`

STEP 2d: Set up the equation to solve for the adjacent side, in this case b.

`b=c*cos(A)`

STEP 2e: Substitute the values of each variable into the formula for cosine.

`b=8*cos(45)`

STEP 2f: Cancel the common factor of 2.

`a=4√(2)`

HOPE THIS HELPS!