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kirill [66]
3 years ago
10

Which statement about the figures shown below is true?

Mathematics
1 answer:
Lelechka [254]3 years ago
8 0
The answer is C. Figures K and N are parallelograms. Hope this helped !
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Drag each length to the correct location on the image. Each length can be used more than once, but not all lengths will be used.
RSB [31]

Answer:

The length of the unknown sides of the triangles are as follows:

CD = 10√2

AC = 10√2

BC =  10

AB = 10

ΔACD is a right angle triangle. Therefore, Pythagoras theorem can be used to find the sides of the triangle.

c² = a² + b²

where

c = hypotenuse side = AD = 20

a and b are the other 2 legs

lets use trigonometric ratio to find CD,

cos 45 = adjacent / hypotenuse

cos 45 = CD / 20

CD = 1 / √2 × 20

CD = 20 / √2 = 20√2 / 2 = 10√2

20² - (10√2)² = AC²

400 - 100(2)  = AC²

AC² = 200

AC = √200 = 10√2

ΔABC is a right angle triangle too. Therefore,

AB² + BC² = AC²

Using trigonometric ratio,

cos 45 = BC / 10√2

BC = 10√2 × cos 45

BC = 10√2 × 1 / √2

BC = 10√2 / √2 =  10

(10√2)² - 10² = AB²

200 - 100 = AB²

AB² = 100

AB = 10

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
What trig function would I use to solve for x?
IRINA_888 [86]

Answer:

Cosine

Step-by-step explanation:

SohCahToa

The sides are: adjacent to the angle and are the hypotenuse.

(hope this helps :P)

8 0
2 years ago
Help! Due soon!!!!!!!!!
denis23 [38]

Answer:

78.75

Step-by-step explanation:

450 is increased by 75%

450 + 450*75%

Change to decimal form

450 +450*.75

450+337.5

787.5

Now decrease by 90%

787.5-787.5*90%

Change to decimal form

787.5-787.5*.9

787.5-708.75

78.75

8 0
2 years ago
Read 2 more answers
In order to attract more advertisers to the arena during the sports events, the arena plans to offer advertising space as corpor
beks73 [17]
720 divided by 8 and then look up the answer to that as a fraction on Google
3 0
3 years ago
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Caroline puts $400 into a savings account that earns 6% annually. Write a function that represents this situation, where t is th
DaniilM [7]

Answer: 19 years

Step-by-step explanation:

Given

Amount invested \$400

Rate of interest R=6\%

after 1-year amount becomes

A=400\left (1+6\%\right)\\A=400\left (1+0.06\right)\\A=400\times 1.06\\A=\$424

After n years it is

A=400\left (1.06\right)^n

Sum accumulated is \$1200

\Rightarrow 1200=400\left(1.06\right)^n\\\Rightarrow 3=\left(1.06\right)^n\\\text{Taking log both sides}\\\Rightarrow n=\dfrac{\ln 3}{\ln 1.06}\\\\\Rightarrow n=18.85\approx 19\ \text{years}

5 0
3 years ago
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