3 years ago

Find the sum of interior angles in a 5 sided polygon

Mathematics

1 answer:

densk [106]3 years ago

3 0

Answer:

540 degrees

Step-by-step explanation:

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Given: triangle ABC and triangle EDC, C is the midpoint of BD and AE. <br>Prove: AB || DE

VladimirAG [237]

Step-by-step explanation:

1. ΔABC=ΔCDE: a) according to the condition BC=CD and AC=CE; b) m∠(BCA)=m∠(DCE).

2. if ΔABC=ΔCDE, then m∠(BAC)=m∠(DEC) and m∠(ABC)=m∠(CDE).

3. if m∠(BAC)=m∠(DEC), then AB || DE (or if m∠(ABC)=m∠(CDE), then AB || DE).

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3 years ago

A crew will arrive in one week and begin filming a city for a movie. The mayor is desperate to clean the city streets before fil

Tatiana [17]

Answer:

I think you would add the numbers then divide by 2

Step-by-step explanation:

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3 years ago

If the class mark and class size of the class

Gemiola [76]

Answer:

The class interval is: 20-30

Step-by-step explanation:

Let l be the lower class limit and u be the upper class limit.

Then according to given statement that class mark is 25

$\frac{l+u}{2} = 25\\l+u = 50\ \ \ Eqn\ 1$

And

Class size is 10

So, the second equation will be:

$u-l = 10\ \ \ \ Eqn\ 2$

Adding equation 1 and 2

$l+u+u-l = 50+10\\2u = 60\\\frac{2u}{2} = \frac{60}{2}\\u = 30$

Now putting u =30 in equation 1

$l+u = 50\\l+30 = 50\\l = 50-30\\l = 20$

A class interval is written in the form that lower limit comes first and upper limit comes second.

So,

20-30

Hence,

The class interval is: 20-30

7 0

3 years ago

The amount of money you make varies directly with the number of hours you work. You earn $59.50 for 7 hours of work. How much mo

Arlecino [84]

1 hundred and two dollars

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3 years ago

Marcy bought a total of 20 years books and CDs during a yard sale for a total of $54.50 cents. If books cost $1.50 each and CDs

Olenka [21]

Answer:

x + y = 20

1.5x + 5y = 54.50

Solve the equations and get: x = 13 ∧ y = 7

Marcy bought 13 books and 7 CDs.

6 0

4 years ago