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Yakvenalex [24]
3 years ago
8

The ratio of the lengths of the sides of △ABC is 3:4:6. The perimeter of the triangle whose vertices are the midpoints of the si

des of △ABC is 13 cm. Find the lengths of the sides of △ABC.
Mathematics
1 answer:
Nikolay [14]3 years ago
4 0

Given ratio of the triangle is 3:4:6

The perimeter of the triangle whose vertices are the midpoints of the sides of △ABC is 13 cm. This is the smaller triangle built within the bigger one.  

And the perimeter of the small triangle is 13 cm. The sides are midpoints of the bigger triangle so they are half the lengths of sides.

So, the bigger triangle has sides 6,8 and 12 cm.

Hence, 3+4+6 = 13. So 3*2 , 4*2 , 6*2  is the bigger one.

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5+2+5+2=14 that is the answer


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The school library has 2,986 books on it each shelf has 48 books on it shelves are in the library ​
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1ST  Piece  =======>    2x ======>  2  *   3 ft.  ======>   6 ft.

2ND  =========>    5x        =======>    5  *  3 ft.   ======>  15 ft.

3RD  ==========> 4 Feet     =======> 4 ft.

Sum  ======>    25 Feet



Equation:

(2x    +    5x)       +     (4)       =        25


Let's solve your equation step-by-step.

2x       +      5x      +      4     =       25

Step 1: Simplify both sides of the equation.

2x       +         5x       +       4       =      25

(2x      +      5x)         +         (4)       =     25         (Combine Like Terms)

7x       +      4      =       25

7x        +      4       =     25

Step 2: Subtract 4 from both sides.

7x       +      4       −       4      =     25     −    4

7x     =      21

Step 3: Divide both sides by 7.

7x / 7       =         21 / 7

Answer ========>          x        =         3




Check:

(2x    +    5x)       +     (4)       =        25

2(3)   =    6

5(3)    =   15

3rd  Piece  =    4

Sum  =      25

6ft.    +      15ft.       +      4ft       =     25

25             =                    25




Hope that helps!!!!!!!!!!!!!                                              : )






6 0
3 years ago
WILL MARK BRAINIEST!!!!!!!!!!! PLEASE HELP ASAP
navik [9.2K]

Answer:

I think B but I'm not sure

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
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