1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
pentagon [3]
3 years ago
5

ABCDEFGHIJ is a regular decagon and the measure of <D is 144º. What is the measure of <A?

Mathematics
2 answers:
AnnyKZ [126]3 years ago
4 0

Answer:

1. 144⁰

2. 60⁰

Step-by-step explanation:

The formula to find the measure of the interior angles of a regular polygon is:

m< = (n - 2) • 180/n where n = the number of sides

For a decagon, there are 10 sides.

m< = (10-2) • 180/10 = 144°

A regular polygon/equilateral triangle is defined as having equal sides and angles.

KatRina [158]3 years ago
4 0

Answer:

given ABCDEFGHIJ is a decagon

As we know the sum of all ten interior angles of a decagon = 1440°

so measure of each angle of decagon = (1440/10)° = 144°

so the measure of ∠A would be 144° (C)

given Δ ABC is a equilateral triangle

As we know the sum of all three interior angles of a equialter traingle = 180°

so if one angle of an equilateral triangle is 60°

then the remaining of the angles would have the measure of 60° each

So answer = 60°(B)

Hope it helps

You might be interested in
Does 2 x 6 +15538 equal 15550
k0ka [10]
Yes, it does
12+15538=15550
3 0
3 years ago
Read 2 more answers
g If a hypothesis test with a significance level of α rejects H0: μ1=μ2 in favor of Ha: μ1≠μ2, then thecorresponding (1- α)% con
Effectus [21]

Answer:

The statement, (1- <em>α</em>)% confidence interval for (μ₁ - μ₂) does not contain zero is TRUE.

Step-by-step explanation:

The hypothesis for a test is defined as follows:

<em>H</em>₀: μ₁ = μ₂ vs. <em>H</em>ₐ: μ₁ ≠ μ₂

It is provided that the test was rejected st the significance level <em>α</em>%.

If a decision is to made using the confidence interval the conditions are:

If the null hypothesis value is not included in the (1 - <em>α</em>)% confidence interval then the null hypothesis will be rejected and vice versa.

In this case the null hypothesis value is:

<em>H</em>₀: μ₁ - μ₂ = 0.

If the value 0 is not included in the (1 - <em>α</em>)% confidence interval for the difference between two means, then the null hypothesis will be rejected.

Thus the statement, (1- <em>α</em>)% confidence interval for (μ1- μ2) does not contain zero is TRUE.

5 0
3 years ago
Who wants to play rocket league with me<br><br>I'm gold3 so sry​
maw [93]

Answer:

Bet

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
How do you do the pythagorean theoreom backwards?
Ipatiy [6.2K]

Answer:

I think it's called the  Converse of the Pythagorean. This tells us that if the square of one side of a triangle is equal to the sum of the squares of the other two sides, then the triangle is a right triangle.To do this you just plug in the numbers where c is the largest among a,b,c. ( in case you forgot a and b are bases and the c is called the hypotenuse)

8 0
3 years ago
Ummmmm??? Is it c? Irdk
bija089 [108]

Answer:

Yes

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Determine the range of the function.
    12·1 answer
  • 7x + 2y &gt; -5. (1,1)
    10·1 answer
  • Jenny is solving the equation 3 x + 5 = 4 x + 2 using algebra tiles. She cannot decide if she should add 3 negative x-tiles or a
    14·2 answers
  • a number is divided by 3 and the result is added to 1. the new result is doubled to give the final result 80. whats the number
    14·1 answer
  • 2x2 − 1 = 3x + 4 Which equation correctly applies the quadratic formula?
    15·1 answer
  • Can anyone solve this?????^_^​
    6·1 answer
  • What is the measure of angle BEC?
    9·1 answer
  • protocol for flushing a cooling water system at a nuclear reactor requires that a drain valve be opened while the fill pumps are
    13·1 answer
  • I need help again lol
    8·1 answer
  • Help ASAP please....​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!