With question 12 at the top, i dont really want the answer. i just want how to figure it out !

a: .

b: .

c: .

Step-by-step explanation:

Apply the Pythagorean Theorem. The square of the hypotenuse of a right triangle is the sum of the squares of the two legs.

For triangle in a:

Apply the Pythagorean Theorem.

.

As a result, .

Try the same steps for the triangle in b. .

Question c includes a rectangle. The lengths of opposite sides of a rectangle are equal. As a result, for the right triangle with a right angle at the lower-right corner of the rectangle:

Apply the Pythagorean Theorem:

As a result,