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3 years ago

Which of these statements describe properties of parallelograms ? check all that apply

Mathematics

2 answers:

Llana [10]3 years ago

8 0

Answer:

Question is incomplete

Step-by-step explanation:

But the common properties of a parallelogram are:

1. Diagonals bisect at 90 degrees

2. Opposite angles are equal

3. Opposite sides are equal

4. Rotational symmetry of order 2

5. No lines of symmetry

6. Quadrilateral.

Hope this helps

Stella [2.4K]3 years ago

7 0

Answer:

Step-by-step explanation:

Following are some properties of parallelogram:

Opposite sides of a parallelogram are congruent.

Opposite angles of a parallelogram are congruent.

Consecutive angles of a parallelogram are supplementary.

If a parallelogram has 1 right angle, then it has 4 right angles.

The diagonals of a parallelogram bisect each other.

Hope this helps

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oksano4ka [1.4K]

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3 years ago

Norma has an A-frame cabin.The back is shown below. How many square feet of paint will she need to cover the back of the cabin?

a_sh-v [17]

I FOUND YOUR FULL QUESTION IN OTHER FUENETES.
PLEASE SEE ATTACHED IMAGE.
For this case what you should do is find the area of the triangle which will be given by:
A = (1/2) * (b) * (h)
Where
b: base
h: height
Substituting the values we have:
A = (1/2) * (25 1/2) * (15)
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Answer:
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3 years ago

There are 18 students in a music class , 6 of them are male. What is the probability of choosing a male student from the class?

Crank

Answer:

0.33 repeating

Step-by-step explanation:

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4 years ago

Read 2 more answers

The U.S. Census Bureau conducts a study to determine the time needed to complete the short form. The Bureau surveys 200 people.

NISA [10]

Answer:

$8.2-2.58\frac{2.2}{\sqrt{18}}=6.86$

$8.2+2.58\frac{2.2}{\sqrt{18}}=9.54$

So on this case the 90% confidence interval would be given by (6.86;9.54) And the error is given by:

$ME= 2.58\frac{2.2}{\sqrt{18}} =1.338$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X=8.2$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

$\sigma=2.2$ represent the population standard deviation

n represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.005$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.005,0,1)".And we see that $z_{\alpha/2}=2.58$