A pentagon has a perimeter of 40 cm. What is the perimeter of the pentagon after
A pentagon has a perimeter of 40 cm. What is the perimeter of
the pentagon after a translation of (x,y) → (x-7, y + 5) and a
rotation of 90° clockwise about the origin is applied? How do
you know?
The pentagon went through a translation and a rotation, which does not affect the pentagon's side lengths.
ghernadez
4,4(36 marks)
The answer is a + 12
Solution: In order to solve it, you need to separately solve the numbers that have something in common- for ex: if they are just numbers, or if they have the same exact variables
In order to make it easier, you can rearrange the equation 4a - 3a + 19 - 7 4a - 3a = a 19 - 7 = 12
Since these numbers can't be combined due to the fact that they have nothing in common, you leave the equation as is, resulting in the
a + 12
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