Squares and square roots

Square, then undo it

x² multiplies a number by itself. √x undoes that square. A 12 ft side gives 144 ft²; the square root takes you back to 12 ft.

Try it · a 12 ft square

Use 2nd if Feet is above its key.

1. Start fresh

   Press Clear entry, then Clear entry, then Select length units.C→C→Length

2. Enter one side and square it

   Press 12, then feet, then Square.12→Feet→x²

Get the side back

1. Take the square root

   Press Square root.√x

Also useful for

Square floor sections, sheet-metal blanks, access panels and square pads. For similar shapes, square root turns an area ratio into a length ratio.

Remember

This finds a side only for a square. For a rectangle, multiply length by width.

Start a new calculation

1. Press Clear entry, then Clear entry.C→C

Calculate

1. Area

   Press 144, then Second, then Select area units, then Square inches, then Square root.144→2nd→Area→in²→√x

Start a new calculation

Use 2nd if a unit is above its button.

1. Start fresh

   Press Clear entry, then Clear entry.C→C

2. Press the keys

   Press Select length units.Length

Calculate

1. Side length

   Press 7, then feet, then 4, then inches, then Square.7→Feet→4→Inch→x²