Grade 9 Unit 3 Review: Square Roots and Surface Area

Which value has a square root of:
 $\frac{4}{9}$  

•  $\frac{8}{18}$  

•  $\frac{2}{3}$  

•  $\frac{16}{81}$  

•  $\frac{2}{4.5}$  

Simplify:  
 $\sqrt{\frac{25}{49}}$    

•  $\frac{50}{98}$  

•  $\frac{5}{7}$  

•  $\frac{1}{2}$  

•  $\sqrt{\frac{5}{7}}$  

Is the following fraction a perfect square? If so, find its square root.
 $\frac{10}{25}$  

• Yes;  $\frac{2}{5}$  

• Yes;  $\frac{100}{625}$  

• Yes;  $\frac{5}{12.5}$  

• No, it is not a perfect square.

Which of the following is the closest perfect square to:
 $\frac{10}{33}$  

•  $\frac{9}{36}$  

•  $\frac{1}{2}$  

•  $\frac{1}{3}$  

•  $\frac{16}{36}$  

Estimate the following square root:
 $\sqrt{\frac{7}{15}}$  

•  $\frac{9}{16}$  

•  $\frac{1}{2}$  

•  $\frac{3}{4}$  

•  $\frac{49}{225}$  

This object is made from 7 centimetre cubes. Determine its surface area.

• $24cm^2$

• $26cm^2$

• $28cm^2$

• $29cm^2$

This object is made from 3 identical rectangular prisms. Find its surface area.

• $12\ 000cm^2$

• $12\ 875cm^2$

• $14\ 750cm^2$

• $20\ 250cm^2$

This object is made from a triangular prism on top of a rectangular prism. Find its surface area.

• $441cm^2$

• $351cm^2$

• $297cm^2$

• $207cm^2$

This object is made from one cylinder on top of another cylinder. Both diameters are given. Find the surface area.

• $440cm^2$

• $500cm^2$

• $553cm^2$

• $585cm^2$

This object is formed from two triangular prisms and one rectangular prism. Find its surface area.

• $298cm^2$

• $352cm^2$

• $382cm^2$

• $424cm^2$