When can a parallelogram also be called a rectangle?

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Step-by-step explanation:

A rectangle is is a type of parallelogram with four right angles.

A parallelogram can be called a "Rectangle" when all its angles measure 90° (right angles).

Step-by-step explanation:

You need to remember the following definitions:

1. A quadrilateral is a polygon that has four straight sides.

2. A parallelogram is a quadrilaleral whose opposite sides are parallel and its opposite angles equal.

3. A rectangle is a quadrilateral whose opposite sides are parallel and have equal lenght. Every angle of a rectangle measure 90 degrees.

Based on this, you can conclude that a rectangle is a  parallelogram.

Therefore, a parallelogram can be called a "Rectangle" when  all its angles measure 90° (right angles).

the clues that signal the reader should change tone are the punctuation marks, the grammatical signs. for example, the quotation marks at the beginning of something someone else said literally or the exclamation marks.

the tone of the first line of dialogue until "gettysburg" is a kind tone, a tone of advise. the narrator is trying to the other person in doing something he or she obviously is finding hard to do by giving a piece of advise and bringing up a memory of a successful similar case.

the clue that the reader understand how to read the word "bang" is the exclamation mark. it gives the word a surprise tone, a strong accent.

the best tone for reading the word "bang" is an exciting tone, a surprise one, even a loud one.

the words that should be read with a formal tone are the ones that give factual information. the sentence: mister lincoln couldn't think of anything to say at the gettysburg" gives information about an event and it needs to be read formally, also, when the narrator wants to transmit calmness, a formal and slow tone is needed, because people also transmit messages with the vibrations of our voices and tones.