The plane is 2 dimensional because it has height and width, which is a total of 2 dimensions.
The third choice is your answer since it is the only choice that has the proper dimension along with the proper explanation.
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<span>x in (-oo:+oo)
(8/9)*x = (4/9)*x+8 // - (4/9)*x+8
(8/9)*x-((4/9)*x)-8 = 0
(8/9)*x+(-4/9)*x-8 = 0
4/9*x-8 = 0 // + 8
4/9*x = 8 // : 4/9
x = 8/4/9
x = 18
x = 18
</span>
Answer:
25 cm is the perimeter...........
