Answer :
Part a
Find the area of a kite with diagonals 18" and 5".
Applying the given formula
[tex]\begin{gathered} A=\frac{1}{2}\cdot(18\cdot5) \\ A=45\text{ in2} \end{gathered}[/tex]the area is 45 square inches
Part b
Find the area of a square with diagonal v2 cm
applying the formula
[tex]\begin{gathered} A=\frac{1}{2}\cdot(\sqrt[]{2})\cdot(\sqrt[]{2}) \\ A=\frac{2}{2}=1\text{ cm2} \end{gathered}[/tex]the area is 1 square centimeter