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bekas [8.4K]
3 years ago
9

What is the sum of the measures of interior angles of a 15-sides polygon

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
5 0
Using
sum = (n-2)180
= (15-2)180 = 13×180 = 2340°
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Sarah is 25 years older than her son gavin in 10 years sarah will be twice gavin's age how old was sarah and gavin now
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Sarah is 40 and gavin is 15
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3 years ago
A square has side length of 9 in. If the area is doubled, what happens to the side length?
Alika [10]

Answer:

The side length is multiplied by \sqrt{2}

Step-by-step explanation:

we know that

The area of the original square is equal to

A=9^{2}=81\ in^{2}

If the area is doubled

then

The area of the larger square is

A1=(2)81=162\ in^{2}

Remember that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z ----> the scale factor

x ----> the area of the larger square

y ---> the area of the original square

so

z^{2}=\frac{x}{y}

we have

x=162\ in\^{2}

y=81\ in\^{2}

z^{2}=\frac{162}{81}

z^{2}=2

z=\sqrt{2} ------> scale factor

therefore

The side length is multiplied by \sqrt{2}

7 0
3 years ago
Total donations at the firemans ball failed to reach $940
kumpel [21]
That sucks they should've worked harder
8 0
3 years ago
The line with equation a + 4b = 0 coincides with the terminal side of an angle θ in standard position and cos θ>0 . What is t
Nikitich [7]

Answer:

\frac{-1}{\sqrt{17} }

Step-by-step explanation

We have given that equation of line a+4b=0

⇒4b= -a

⇒b= \frac{-a}{4}

slope of line = tan\theta =\frac{P}{B}= \frac{-1}{4}

⇒ tan\theta is negative therefore it lies into 4th quadrant

By, Pythagoras theorem H^2=P^2+B^2

by putting value of P= -1 & B=4

the value of H=\sqrt{17}

with the given condition cos\theta>0

i.e. \theta∈ (3π/2, 2π)

now, sin\theta= \frac{P}{H}= \frac{-1}{\sqrt{17}}



6 0
3 years ago
I sthe answer A? IM only half sure??
trasher [3.6K]
You are correct there is no pattern

5 0
3 years ago
Read 2 more answers
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