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Taylor129
04.02.2020 •
Mathematics
If the length of each edge of the cube is doubled, the surface area will increase 2 times.true or false
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Ответ:
False. The surface area of the cube will increase to four times its initial value.
Step-by-step explanation:
Consider a cube with edge of lengths
. What will be its surface area?
Each face of a cube is a square. The lengths of sides of the square are also
.
The area of each square will be the square of its sides:
.
It takes six such squares to make a cube. The sum of the area of the sube
will also be the surface area of the cube.
In case the length of each side of the cube is doubled to
.
The area of each face will becomeОтвет:
the answer is 70
Step-by-step explanation: