How do I complete these questions a bit confused . (extra credit work )​

(1)

(2)

Step-by-step explanation:

Solving (1):

Considering

We have:

This gives:

Solve for a

So:

To solve for b, we make use of Pythagoras theorem

This gives

Collect like terms

Take LCM and solve

Take square roots

Solving (2):

Considering

We have:

This gives:

Solve for a

So:

To solve for b, we make use of Pythagoras theorem

This gives

Collect like terms

Take square roots