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2 years ago

Use triangles to find the sum of the interior angle measures of the polygon. What's the answer?

Mathematics

2 answers:

Kryger [21]2 years ago

7 0

Answer: 180*5=900

Step-by-step explanation:

1) Start from the middle triangle and draw 2 lines connecting the edges to the bottom 2 angles. This should result in the crown splitting into 3 sections.

2) Go to the triangles on each side and connect them to the middle triangle. It should result in the crown having 5 triangles.

3) Multiply the 5 triangles by 180 (the angle sum of a triangle) to get 900.

Crown after all the lines are drawn:

kiruha [24]2 years ago

6 0

Answer:

explain the answer correctly please

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Write an expression for the verbal phrase:<br> the difference between k and half of b is 47

Helga [31]

k-1/2b=47 because the difference is subtraction and half b is a half fraction and it equals 47.

6 0

2 years ago

Solve for x.

Ivahew [28]

ANSWER

$x=\frac{2-\sqrt{10}} {3}$

or

$x=\frac{\sqrt{10}+2} {3}$

We have

$3x^2-4x-2=0$

Since we cannot factor easily, we complete the square.

Adding 2 to both sides give,

$3x^2-4x=2$

Dividing through by 3 gives

$x^2-\frac{4}{3}x= \frac{2}{3}$

Adding $(-\frac{2}{3})^2$ to both sides gives

$x^2-\frac{4}{3}x+(-\frac{2}{3})^2= \frac{2}{3}+(-\frac{2}{3})^2$

The expression on the Left Hand side is a perfect square.

$(x-\frac{2}{3})^2= \frac{2}{3}+\frac{4}{9}$

$\Rightarrow (x-\frac{2}{3})^2= \frac{10}{9}$

$\Rightarrow (x-\frac{2}{3})=\pm \sqrt{\frac{10}{9}}$

$\Rightarrow (x)=\frac{2}{3} \pm {\frac{\sqrt{10}}{3}$

Splitting the plus or minus sign gives

$x=\frac{2- \sqrt{10}} {3}$

or

$x=\frac{\sqrt{10}+2} {3}$

3 0

2 years ago

Read 2 more answers

Proportional fraction to 1/4

Pavel [41]

A proportional fraction to 1/4

1 * 1 1
- = -
4 * 4 16

Also known as 1/16

7 0

2 years ago

Which pair of numbers is relatively prime?

kondor19780726 [428]

Answer:

Step-by-step explanation:

Two numbers are relatively prime when there is no integer greater than one that that is a factor of both of them.

A: 15 and 21 both have a factor of 3.

<u>B</u>: 24 and 49 have no common factors, and therefore, are relatively prime.

C. 35 and 135 both have a factor of 5.

D: 45 and 102 both have a factor of 3.

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2 years ago

cylinder A has a radius of 6 centimeters cylinder B has the same height and a radius half as long as cylinder A what fraction of

REY [17]

Volume of a cylinder=the area of the base multiply the height
Cylinder A's volume: pi*6*6*h=36*pi*h
Cylinder B's volume: pi*3*3*h=9*pi*h
so the fraction is 9/36=1/4
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6 0

3 years ago