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3 years ago

Brainliest will be awarded please answer the below question fast u will get points too.

Mathematics

1 answer:

pshichka [43]3 years ago

4 0

Answer:

Step-by-step explanation:

For a number to be divisible by 4 you just need to worry about the 10s and 1s place. You also want to know that the 1s cylce every 20, or in other words:

4 8 12 16 20

24 28 32 36 40 and so on. So the only numbers that x can be there are 1, 3, 5, 7, 9. Does that make sense? and can you manage the rest?

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Drag and drop formal proof. Prove the Polygon Exterior Angle Sum Theorem for the enclosed triangle, that is ∠1+∠2+∠3=360°

jasenka [17]

Answer:

The sum of all the external angles of a triangle is 360°.

Step-by-step explanation:

Let there are n sides in a polygon.

So, there are n internal angles in the polygon, let ∠i1, ∠i2, ∠i3, ..., ∠in are the measure of n internal angles of the polygon.

The measure of external angle corresponding to ∠i1, ∠1= 180°-∠i1,

The measure of external angle corresponding to ∠i2, ∠2 = 180°-∠i2,

Similarly, the measure of external angle corresponding to ∠in, ∠n = 180°-∠in.

Now, the sum of all the external angles of the polygon,

(∠1+∠2+...+∠n)=(180°-∠i1)+(180°-∠i2)+...+(180°-∠in)

=(180°+180°+...n times)-(∠i1+∠i2+...+∠in)

=n x 180° - (∠i1+∠i2+...+∠in)

As ∠i1+∠i2+...+∠in is the sum of all the internal angles of the polygon.

So, the sum of all the external angles of the polygon =

(n x 180°) - (sum of all the internal angles of the polygon).

In the case of a triangle, n=3 and the sum of all the three internal angles, ∠i1+∠i2+∠i3 = 180°.

Therefore, the sum of all the external angles of a triangle,

∠1+∠2+∠3 =3x180°-(∠i1+∠i2+∠i3)

=540°=180°

=360°.

Hence, the sum of all the external angles of a triangle is 360°.

5 0

3 years ago

What is the area of △STU rounded to the nearest tenth?

valentinak56 [21]

Answer:

38.7 units²

Step-by-step explanation:

4.6/SV = SV/8.1

SV² = 37.26

SV = 6.1

area = 1/2(8.1)(6.1) + 1/2(4.6)(6.1) = 38.7 units²

4 0

3 years ago

Terry's essay has 9 more pages than stacey's essay. If s represents the number of pages in stacey's essay, write an expression f

german

t = 9 + s is the expression for number of pages in terry's essay

<em><u>Solution:</u></em>

Given that, Terry's essay has 9 more pages than stacey's essay

Let "s" be the number of pages in Stacey essay

Let "t" be the number of pages in terry essay

To find: Expression for the number of pages in terry's essay

From given statement,

Terry's essay has 9 more pages than stacey's essay

Which means, number of pages in terry essay is 9 more than number of pages in Stacey essay

Therefore,

Number of pages in terry essay = 9 + number of pages in Stacey essay

$t = 9 + s$

Thus the expression for number of pages in terry's essay is found

5 0

4 years ago

Find

algol13

Answer:

60 to nearest 10th is 60.

Step-by-step explanation:

i hope that is right if it is can b e marked brainest?

3 0

3 years ago

36. MAKING AN ARGUMENT Your friend claims that a rectangle with the same perimeter as QRS will have the same area as the triangl

Elenna [48]

Answer: no; A 1 X 5 rectangle has a perimeter of 12 units and does not have an area of 6 units, so a counterexample shows that your friends statement is not correct

5 0

4 years ago