Please help me with this!

Which best describes the angles of some parallelograms?

Vinil7 [7]

The answer is C. 4 obtuse angles could not make a 4 sided figure such as a parrallelogram. 4 acute angles is not possible for creating parallelograms either.

7 0

3 years ago

12 is 90% of what number? with steps

a_sh-v [17]

Answer:

<h3>Let's understand the concept:-</h3>

Here 12 is 90% of a number.
So we can say that 90% of That number is 12 .
In this way we can get the the number

<h3>Solution:-</h3>

Let,

the number=x

<h3>According to the question ,</h3>

${:}\longrightarrow$ $\sf 90\% \:of \;x=12$

We know 90%=90/100
so add it

${:}\longrightarrow$ $\sf {\dfrac {90}{100}}\times x=12$

${:}\longrightarrow$ $\sf {\dfrac {90x}{100}}=12$

Now use cross multiplication method

${:}\longrightarrow$ $\sf 90x=12\times 100$

${:}\longrightarrow$ $\sf 90x=1200$

Now interchange sides .

${:}\longrightarrow$ $\sf x={\dfrac {1200}{90}}$

${:}\longrightarrow$ $\sf x={\dfrac {200}{15}}$

Answer will come in decimals so we take approximate value.

${:}\longrightarrow$ $\sf x=13.3$

${:}\longrightarrow$ $\sf x=approximately \:13$

$\therefore$ The number is 13.

6 0

3 years ago

Please answer this question

Y_Kistochka [10]

$\bold{\huge{\underline{ Solution }}}$

Before answering the given question, you should know the difference between polygon and regular polygon. 

Polygon :- It is closed figure constitute of straight line having different measurements and also having varies angles.
Regular polygon :- It is also a closed figure constitute of straight lines which having equal measuresment and all the angles of the given polygon are equal .

There are different types of polygon based on the sides :-

A polygon having 3 sided called triangle ,having 4 sides called quadrilateral ,having 5 sides pentagon and so on.

<h3>Let's Begin :-</h3>

I have thought to make a 4 side polygon that is quadrilateral.

Steps of construction :-

Step - 1 :- Draw a 5 cm line AB horizontally
Step - 2 :- Then , From a point B, Draw a Vertical line of 5 cm and named it BC
Step - 3 :- Then, From a point C, Draw a horizontal line of 5 cm and named it CD
Step - 4 :- Now, join the line AD
Step - 5 :- Measure all the angles form by the 4 sides of the quadrilateral.

Result :-  All the angles are equal that is 90° each.

Conclusion :-  The above figure is square as it is having equal sides and angles.

<h3>Now, we have to find the sum of the angles of the polygon :-</h3>

Here, 

All angles are equal in measure 90°

Therefore, 

The sum of the angles of the given polygon

$\sf{ = 90{\degree} + 90{\degree} + 90{\degree} + 90{\degree} }$

$\sf{ = 180{\degree} + 90{\degree} + 90{\degree} }$

$\sf{ = 270{\degree} + 90{\degree} }$

$\sf{ = 360{\degree} }$

Hence, The sum of the angles of the above polygon is 360° .

6 0

2 years ago

Solve for x. 5x - (2x - 2) = 17

neonofarm [45]

Answer:

6.3

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Which ratio represents 18:27 in simplest form?

inn [45]

D. 2:3..
Ratios are basically fractions. Find a number that both numbers in the ration can divide into. In this case, it's 3. 18/3 is 6 and 27/3 is 9. but you're still not done, because 6/3 is 2 and 9/3 is 3

7 0

3 years ago

Read 2 more answers