What expression is equal to a x a x a x b xb

In a circle, a 45° sector has an area of 32π cm2. what is the radius of this circle? 32 cm 12 cm 16 cm 8 cm

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

Acircus act has 3 times as many elephants as acrobats. jorge noticed that all together there were 56 legs in the circus ring. how many elephants were in the show?