Find the area of each square and find the perimeter to​

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Which of the following circles have their centers on the x-axis? check all that apply.