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40 votes
40 votes
Please help me with this it's so hard thanks ​

Please help me with this it's so hard thanks ​-example-1
User Tee
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2.4k points

1 Answer

25 votes
25 votes
This is easy if you know the right formula to use. Here, I’ll walk you through it

To calculate perimeter (borderline) of the rectangle use: 2(l+b). ‘It’s the same as adding the length of all four sides, you can do that too’
To calculate the area of a rectangle the formula is length*width


Now let’s look at the question. For part a it asks us to wrap ribbon *around* the mirror
This means the length of the ribbon will be the same as the perimeter of the mirror


Perimeter=
2(6+10)
= 2(16)
= 32 inches

For part be we have to find the area so:
Length * width
6 * 10 inches
= 60 inches


Hope this helps
User Stefan Bachert
by
2.4k points