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Vilka [71]
3 years ago
7

Find the length of the third side to the nearest thenth

Mathematics
1 answer:
snow_lady [41]3 years ago
7 0

Answer:

its 5

Step-by-step explanation:

it five bc look at the mesuarement

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$\triangle DEF$ is the medial triangle of $\triangle ABC$ and $\triangle XYZ$ is the medial triangle of $\triangle DEF.$ If the
lbvjy [14]

A medial triangle is made from the midlines of the larger triangle, and its

length is half the length of the third side of the triangle.

  • The perimeter of ΔABC is <u>20</u>

Reasons:

The medial triangle of triangle ΔABC is triangle ΔDEF

The medial triangle of  ΔDEF is ΔXYZ

The perimeter of ΔXYZ = 5

By the midpoint theorem, we have;

The lengths of the sides of ΔDEF = 0.5 × The lengths of the sides of ΔABC

∴ The perimeter of ΔDEF = 0.5 × The perimeter of ΔABC

Which gives;

The perimeter of ΔABC = 2 × The perimeter of ΔDEF

Similarly, between ΔXYZ and ΔDEF, we have;

The perimeter of ΔDEF = 2 × The perimeter of ΔXYZ

∴ The perimeter of ΔDEF = 2 × 5 = 10

Therefore;

The perimeter of ΔABC = 2 × 10 = 20

<u>The perimeter of ΔABC = 20</u>

Learn more about the perimeter of a triangle here:

brainly.com/question/1340753

6 0
3 years ago
The units pf the digits of a two digits numeral is 8 if the digits are reversed the new number is 18 greater than the oringal nu
ra1l [238]

complete question:

The sum of the digits of a two-digit numeral is 8. If the digits are reversed, the new number is 18 greater than the original number. How do you find the original numeral?

Answer:

The original number is 10a + b  = 10 × 3 + 5  = 35

Step-by-step explanation:

Let

the number = ab

a occupies the tens place while b occupies the unit place. Therefore,

10a + b

The sum of the digits of two-digits numeral

a + b = 8..........(i)

If the digits are reversed. The reverse digit will be 10b + a. The new number is 18 greater than the original number.

Therefore,

10b + a = 18 + 10a + b

10b - b + a - 10a = 18

9b - 9a = 18

divide both sides by 9

b - a = 2...............(ii)

a + b = 8..........(i)

b - a = 2...............(ii)

b = 2 + a from equation (ii)

Insert the value of b in equation (i)

a + (2 + a) = 8

2a + 2 = 8

2a = 6

a = 6/2

a = 3

Insert the value of a in equation(ii)

b - 3 = 2

b = 2 + 3

b = 5

The original number is 10a + b  = 10 × 3 + 5  = 35

6 0
3 years ago
What is the equation for n in 5n+10=n+4
In-s [12.5K]

Answer:

-3/2 or 1.5

Step-by-step explanation:

5n + 10 = n + 4

5n - n = -10 + 4

4n = -6

n = -6/4

n = -3/2 (or -1.5)



3 0
3 years ago
4. How much does the landscaper charge<br> for 4 hours of service?<br> $40<br> O $65<br> O $110
Kaylis [27]
First of all, you did not tell me much, how much is it for 1 hour of service?
8 0
3 years ago
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The total surface area of a right circular cylinder is 84 pie cm square and the altitude is 11 cm .find the radius of the base​
djyliett [7]

Answer:

use the formula r = square root of (V / (pi x h))

8 0
3 years ago
Read 2 more answers
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