Squares and Square Roots

If the area of a square is 81cm², what is the side length?

• 9cm
• 81cm
• 3cm
• 9cm²

If the volume of a cube is 27in³, what is the length of one side of the cube?

• 3in
• 9in
• 2.7in
• 3cm

If the volume of a cube is 64cm³, what is the area of one face of the cube?

• 16cm²
• 4cm
• 8cm²
• 12cm

 Solve the equation x²=49. 

• 7
• -7
• ±7
• None of the above

Solve the equation n²=81. 

• ±9
• -9
• 9
• None of the above.

√81

• 9
• 10
• 8
• 6

√100

• 15
• 10
• 11
• 12

√4

• 3
• 4
• 2
• 1

√16

• 4
• 8
• 2
• 9

√121

• 12
• 10
• 11
• 3