
Year 9 - Expressions and Formulae Review
Flashcard
•
Mathematics
•
7th - 9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the formula for the perimeter of a rectangle?
Back
The perimeter (P) of a rectangle is given by the formula: P = 2(length + width).
2.
FLASHCARD QUESTION
Front
If the width of a rectangle is 'w' cm and its length is 'l' cm, how can we express the length in terms of the width if the length is 4 cm more than the width?
Back
The length can be expressed as: l = w + 4.
3.
FLASHCARD QUESTION
Front
What is the relationship between the perimeter, length, and width of a rectangle?
Back
The perimeter is the total distance around the rectangle, calculated as P = 2(length + width).
4.
FLASHCARD QUESTION
Front
If the perimeter of a rectangle is 28 cm, what equation can we set up using the width 'w' and the length 'l'?
Back
The equation is: 28 = 2(w + l).
5.
FLASHCARD QUESTION
Front
How do you isolate 'w' in the equation 28 = 2(w + l)?
Back
First, divide both sides by 2: 14 = w + l. Then, isolate 'w': w = 14 - l.
6.
FLASHCARD QUESTION
Front
If the width of a rectangle is 7 cm, what is the length if the length is 4 cm more than the width?
Back
The length is 7 + 4 = 11 cm.
7.
FLASHCARD QUESTION
Front
What are the dimensions of a rectangle if the width is 5 cm and the length is 4 cm more than the width?
Back
The width is 5 cm and the length is 5 + 4 = 9 cm.
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