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4 years ago

20 points!

Mathematics

2 answers:

meriva4 years ago

4 0

All circles are similar because all circle have same shape.

However Two circles are congruent , if and only if their radii are congruent.

In our question we are asked when are all circles similar given if their radii are congruent.

So we can say this statement is false because no matter the radii are congruent or not , two or more circles are always similar because of their same shape no matter what the measure of their radii is. Only if we are asked when they are congruent, we will consider the radii part.

Answer is false.

anyanavicka [17]4 years ago

4 0

False
All circles are similar because every circle is a dilation of another circle.

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If she wants to track to have a circumference of 150 feet , what does the radius of the track need to be?

Gemiola [76]

Solution:

we are given that

she wants to track to have a circumference of 150 feet.

we have been asked to find

what does the radius of the track need to be?

As we know that

$Circumference=2\pi r$

Substitute the values we get

$150=2 \pi r\\
\\
r=\frac{75}{\pi} \\
\\
r=\frac{75}{22/7}\\
\\
r=\frac{75*7}{22}= 23.863feet$

Hence radius=23.863 feet.

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3 years ago

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UkoKoshka [18]

It's the first answer
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4 years ago

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svet-max [94.6K]

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4 years ago

A bus makes a stop at 2:30 it's letting off 15 people and letting on 9 the bus makes another stop 10 minutes later to let off 4

Snowcat [4.5K]

Answer:
The original number of passengers on the bus decreased by 10 after the second stop

Explanation:
Assume that the total passengers on the bus before 2:30 was x

Now, at 2:30:
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This means that:
number of passengers = x - 15 + 9
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10 minutes later:
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This means that:
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By comparing, we can note that:
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notka56 [123]

Answer:

8 km

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Write and solve an equation of ratios, as follows:

x 8000 km

--------- = -----------------

2 km 2000 m

Cross-multiplying, we get (2000 m)x = (8000 m)(2 km),

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