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3 years ago

Consider the proof.

Mathematics

2 answers:

fiasKO [112]3 years ago

6 0

Answer:

Correct choice is B

Step-by-step explanation:

In step 4 were proved that $\triangle ABC\sim\triangle DEC.$

By definition, similar triangles have proportional lengths of corresponding sides. To the side AB corresponds side ED, to the side AC corresponds side DC and to the side BC corresponds side EC. Thus,

$\dfrac{AC}{DC}=\dfrac{BC}{EC}.$

yKpoI14uk [10]3 years ago

6 0

Answer:

the answer is B;)

Step-by-step explanation:

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Gekata [30.6K]

Answer:

2 2/3

Step-by-step explanation:

V=whl

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2 years ago

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Margarita [4]

Answer:

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Step-by-step explanation:

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3 years ago

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If x-y = 40 and x+y = 70, then what is the value of x squared -y squared ?

OlgaM077 [116]

Let's see what to do buddy...

____________________________

Reminder:

$(a + b)(a - b) = {a}^{2} - {b}^{2}$

So we need to just Multiply above equations like this :

$x + y = 70$

$x - y = 40$

$(x + y)(x - y) = 70 \times 40$

${x}^{2} - {y}^{2} = 2800$

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And we're done.

Thanks for watching buddy good luck.

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3 years ago

Count by tens and ones to find the sum of 45+26

galben [10]

45+10= 55
55+10= 65
65+1= 66
66+1= 67
67+1= 68
68+1= 69
69+1= 70
70+1= 71

Because 10+10+1+1+1+1+1+1= 26,
71 is your answer :)

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3 years ago

At 7:17AM this morning, it was 83˚F outside. What is 83˚F in Celsius? What is 83˚F in Kelvin?

Temka [501]

Answer: 28.33 Celsius and 301.483 Kelvin

83°F − 32) × 5/9 = 28.333°C

(83°F − 32) × 5/9 + 273.15 = 301.483K

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3 years ago