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3 years ago

Which shape has symmetry

Mathematics

2 answers:

Kamila [148]3 years ago

8 0

Answer:

Step-by-step explanation:

noname [10]3 years ago

8 0

Answer:

Step-by-step explanation:

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The answer is E because,

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A is not symmetric because it is indistinguishable from its transformed image.

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B is also not symmetric because it is indistinguishable from its transformed image

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C is not the answer because it looks like a blob and it's indistinguishable.

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D is not the answer because a shape is not a mountain and it is indistinguishable from a form we know.

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E is correct because it has one line of symmetry and it is distinguishable, which means that we know it is a shape that has symmetry.

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Hope this helps! <3

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The area of rectangle gets reduced by 50 sq. units. If its length is reduced by 5 unit and the breadth is increased by 2 unit. I

Bumek [7]

Answer:

Step-by-step explanation:

Let the length and breadth of the rectangle be a,b units respectively.

Then the area will be ab square units.

Now if the length of the rectangle is reduced by 5 units and breadth is increased by 2 units then new length and breadth will be (a−5) units and (b+2) units.

Then new area will be (a−5)(b+2).

Then according to the problem,

(a−5)(b+2)−ab=−80

or, 2a−5b=−70.......(1).

Now if length of the rectangle is increased by 10 units and breadth is decreased by 5 units then new length and breadth will be (a+10) units and (b−5) units.

Then new area will be (a+10)(b−5).

Then according to the problem,

(a+10)(b−5)−ab=50

or, 10b−5a=100

or, 2b−a=20

or, 4b−2a=40......(2).

Now adding (1) and (2) we get

−b=−30

or, b=30.

Putting the value of b in (1) we get, a=40.

Now a+b=40+30=70.

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In the figure, AOB II (parallels) CD, find the values of x and y.

Advocard [28]

Answer:

x = 5, y = 20

Step-by-step explanation:

Since AB and CD are parallel, then

∠ AOC and ∠ OCD are Alternate angles and congruent, thus

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12x = 60 ( divide both sides by 12 )

x = 5

-------------------------------

∠ OCD and 5y + 12 are adjacent angles and supplementary, thus

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