Find the area of the image

Acircle has a circumference of 28.36 units what is the diameter of the circle

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

`if you have a set of parallel lines a and b cut by transversal x, if angle 1 = 167 degrees, what is angle 4 and why. also what is the measure of angle 5 and why? you need to use the names of the angle relationship and explain. ''.