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nlexa [21]
3 years ago
12

Given: Quadrilateral ABCD is a kite. Prove: ΔAED ≅ ΔCED Kite A B C D is shown. Diagonals are drawn from point A to point C and f

rom point B to point D and intersect at point E. It is given that quadrilateral ABCD is a kite. We know that AD ≅ CD by the definition of . By the kite diagonal theorem, AC is to BD This means that angles AED and CED are right angles. We also see that ED ≅ ED by the property. Therefore, we have that ΔAED ≅ ΔCED by .
Mathematics
2 answers:
kolezko [41]3 years ago
8 0

Answer:

1. kite 2. perpendiclular 3. reflective 4. HL

Step-by-step explanation:

I hope this helps :)

muminat3 years ago
3 0

Answer:

We know that AD ≅ CD by the definition of <u>kite</u>. By the kite diagonal theorem, AC is <u>perpendicular </u>to BD. This means that angles AED and CED are right angles. We also see that ED ≅ ED by the <u>reflexive</u> property. Therefore, we have that ΔAED ≅ ΔCED by <u>HL</u>.

Step-by-step explanation:

We know that AD ≅ CD by the definition of <u>kite</u>.

- adjacent sides in a kite are congruent

By the kite diagonal theorem, AC is <u>perpendicular </u>to BD.

- the kite diagonal theorem states that diagonals of a kite form right angles because they are perpendicular to each other.

We also see that ED ≅ ED by the <u>reflexive</u> property.

- any side or angle congruent to itself is identified by the reflexive property

Therefore, we have that ΔAED ≅ ΔCED by <u>HL</u>.

- the triangles formed are all right triangles, so we can they that the two triangles are congruent to each other by the Hypotenuse Leg theorem.

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Answer:

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Step-by-step explanation:

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3 years ago
Solve 2y – 3 = 4y + 6
Keith_Richards [23]

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-4.5 =y

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8 0
4 years ago
22 <br> 20 <br> 14<br> 22<br> 29<br> 20<br> Mean <br> Mode<br> Medium <br> Range
Mrrafil [7]
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5 0
3 years ago
Read 2 more answers
A sociologist wishes to estimate the percentage of the United States population living in poverty. What size sample should be ob
andriy [413]

Answer:

a) We need a sample size of at least 705.

b) We need a sample size of at least 1692.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

a) If she uses 1999 estimate of 11.8% obtained from the Current Population Survey.

We need a sample of size at least n

n is found when M = 0.02, \pi = 0.118.

So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 1.645\sqrt{\frac{0.118*0.882}{n}}

0.02\sqrt{n} = 1.645\sqrt{0.118*0.882}

\sqrt{n} = \frac{1.645\sqrt{0.118*0.882}}{0.02}

(\sqrt{n})^{2} = (\frac{1.645\sqrt{0.118*0.882}}{0.02})^{2}

n = 704.08

Rounding up

We need a sample size of at least 705.

b) She does not use any estimate.

Same thing as above, we just use \pi = 0.5 when do not use any estimate.

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 1.645\sqrt{\frac{0.5*0.5}{n}}

0.02\sqrt{n} = 1.645\sqrt{0.5*0.5}

\sqrt{n} = \frac{1.645\sqrt{0.5*0.5}}{0.02}

(\sqrt{n})^{2} = (\frac{1.645\sqrt{0.5*0.5}}{0.02})^{2}

n = 1691.2

Rounding up

We need a sample size of at least 1692.

4 0
3 years ago
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