The perimeter of a rectangular red sticker is 30 millimeters. The sticker is 4 millimeters tall. How wide is it?
perimeter of a rectangle = 2width + 2length
30= 2w+2(4)
30= 2w+8
22= 2w
w= 11 millimeters
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The área of a rectangular piece of plástico is 20 suare millimeters .the piece of plástico is 2 millimeters tall.how wide is it
To find the width of the rectangular red sticker, we need to use the given information about its perimeter and height.
Let's begin by understanding the concept of a perimeter. The perimeter of a 2D shape is the total distance around its outer edge. For a rectangle, the perimeter can be calculated by adding the lengths of all four sides.
In this case, we know that the perimeter is 30 millimeters. Since a rectangle has two pairs of equal sides, we can divide the perimeter by 2 to get the sum of the lengths of each pair of sides.
Dividing the perimeter (30 mm) by 2 gives us 15 mm, which represents the sum of the lengths of the two equal pairs of sides.
Now, since the sticker is 4 millimeters tall, we can deduce that one pair of sides is the height of the sticker (4 mm). This means the other pair of sides must add up to the remaining length, which is 15 mm - 4 mm = 11 mm.
Since the other pair of sides is equal, we divide 11 mm by 2 to get the length of one side.
Dividing 11 mm by 2 gives us 5.5 mm. Therefore, the width of the rectangular red sticker is 5.5 millimeters.