What do you need to know about two figures to be convinced that the two figures are congruent

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Two rectangular prisms have the same volume. the area of the base of the blue prism is 418 4 1 8 square units. the area of the base of the red prism is one-half that of the blue prism. which statement is true?