Tutorial - Hide Text (Knowls)

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Introduction

Hidden Text opens up when a link word is clicked.

Why

This feature can help students pause to think of their own answer before clicking on the link.

Where you may want hidden text

Solutions to odd exercises
Answers to some examples
Proofs for theorems

Add Hidden Text

Choose EDIT from the top black taskbar.
Click at the end of this list below the spot to insert your Hidden Text.
Select ELEMENTS.
Choose TEMPLATES, then
drop down to Template: AddHiddenText
INSERT TEMPLATE.
Replace Add texts here. Do not delete this text first. with: This is hidden!!
SAVE !!
see how it looks

spot to insert your Hidden Text

Modify an Example to have a Hidden Solution

You will hide the Solution to Example 1 below.
Choose EDIT from the top black taskbar.
Click ABOVE THE WORD Solution IN EXAMPLE 1 BELOW.
Select ELEMENTS, Choose TEMPLATES, then drop down to Template: AddHiddenText, INSERT TEMPLATE.
Copy the text below Solution and paste it on top of Add texts here. Do not delete this text first.
SAVE!!
If it looks good, go back to EDIT mode, rename ANSWER to SOLUTION and erase the original Solution so only your hidden Solution remains.
SAVE !!
see how it looks

Example \(\PageIndex{1}\)

Let \(A = \{\mbox{John}, \mbox{Jim}, \mbox{Dave}\}\) and \(B = \{\mbox{Mary}, \mbox{Lucy}\}\). Determine \(A\times B\) and \(B\times A\).

Answer:: We find \[\displaylines{ A\times B = \{ (\mbox{John},\mbox{Mary}), (\mbox{John},\mbox{Lucy}), (\mbox{Jim}, \mbox{Mary}), (\mbox{Jim}, \mbox{Lucy}), (\mbox{Dave},\mbox{Mary}), (\mbox{Dave},\mbox{Lucy})\}, \cr B\times A = \{ (\mbox{Mary},\mbox{John}), (\mbox{Mary},\mbox{Jim}), (\mbox{Mary},\mbox{Dave}), (\mbox{Lucy},\mbox{John}), (\mbox{Lucy},\mbox{Jim}), (\mbox{Lucy},\mbox{Dave})\}. \cr}\] In general, \(A\times B \neq B\times A\).

Solution

We find \[\displaylines{ A\times B = \{ (\mbox{John},\mbox{Mary}), (\mbox{John},\mbox{Lucy}), (\mbox{Jim}, \mbox{Mary}), (\mbox{Jim}, \mbox{Lucy}), (\mbox{Dave},\mbox{Mary}), (\mbox{Dave},\mbox{Lucy})\}, \cr B\times A = \{ (\mbox{Mary},\mbox{John}), (\mbox{Mary},\mbox{Jim}), (\mbox{Mary},\mbox{Dave}), (\mbox{Lucy},\mbox{John}), (\mbox{Lucy},\mbox{Jim}), (\mbox{Lucy},\mbox{Dave})\}. \cr}\] In general, \(A\times B \neq B\times A\).