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3 years ago

Help fast plz are they similar or not

Mathematics

2 answers:

katrin2010 [14]3 years ago

6 0

They are similar. You want to count the lines and see if they have the same amount then you check if they have the same amount on the coordiating side

Arte-miy333 [17]3 years ago

5 0

Not. They are not similar they are regular I think so

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y<=-x+3 and y<=2x+1

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3 years ago

Kim bakes 1/4 of the cookies that are sold at a local bake sale. 1/3 of her cookies are chocolate chip. 1/4 of Kim's chocolate c

inysia [295]

Answer:

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3 years ago

Find the length of AC Use that length to find the length of

Gekata [30.6K]

Answer:

1. AC = 5 cm

2. CD = 10.7 cm

Step-by-step explanation:

Looking at the left triangle, we see that AC is the side "opposite" of the angle given and AB is the "hypotenuse".

Which trigonometric ratio relates "opposite" to "hypotenuse"?

Yes, that's SINE.

So we can write:

$Sin(30)=\frac{AC}{10}\\AC=10*Sin(30)$

We know from 30-60-90 triangle, Sin(30) = 0.5, so we have:

$AC=10*Sin(30)\\AC=10*0.5\\AC=5$

Thus,

AC = 5 cm

Now, looking at right side triangle, we know AC, side "opposite" and we want to find CD, side "adjacent". Which trig ratio relates these 2 sides?

Yes, that's tan!

Thus we can write:

$Tan(25)=\frac{5}{CD}\\CD=\frac{5}{Tan(25)}$

Now using calculator, we get our answer to be:

CD = $\frac{5}{Tan(25)}=10.7$

CD = 10.7 cm

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3 years ago