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A regular hexagon and a regular pentagon have the same perimeter. All measurements are given in centimeters.

The hexagon has a side length of [tex]\(7m + 3\)[/tex].

The pentagon has a side length of [tex]\(8m + 6\)[/tex].

Work out the value of [tex]\(m\)[/tex].


Sagot :

To find the value of [tex]\( m \)[/tex], let's start by understanding the perimeters of the hexagon and the pentagon.

### Hexagon
A regular hexagon has 6 equal sides. The length of each side of the hexagon is given by [tex]\( 7m + 3 \)[/tex]. Therefore, the perimeter of the hexagon can be calculated as:
[tex]\[ \text{Perimeter of Hexagon} = 6 \times (7m + 3) \][/tex]

### Pentagon
A regular pentagon has 5 equal sides. The length of each side of the pentagon is given by [tex]\( 8m + 6 \)[/tex]. Therefore, the perimeter of the pentagon can be calculated as:
[tex]\[ \text{Perimeter of Pentagon} = 5 \times (8m + 6) \][/tex]

### Setting the Perimeters Equal
Since the perimeter of the hexagon is equal to the perimeter of the pentagon, we set the two expressions for the perimeter equal to each other:
[tex]\[ 6 \times (7m + 3) = 5 \times (8m + 6) \][/tex]

### Simplifying the Equation
First, expand both sides:
[tex]\[ 6 \times 7m + 6 \times 3 = 5 \times 8m + 5 \times 6 \][/tex]
[tex]\[ 42m + 18 = 40m + 30 \][/tex]

Next, isolate the terms involving [tex]\( m \)[/tex]:
[tex]\[ 42m + 18 - 40m = 30 \][/tex]
[tex]\[ 2m + 18 = 30 \][/tex]

Subtract 18 from both sides to solve for [tex]\( m \)[/tex]:
[tex]\[ 2m = 30 - 18 \][/tex]
[tex]\[ 2m = 12 \][/tex]

Finally, divide by 2:
[tex]\[ m = \frac{12}{2} \][/tex]
[tex]\[ m = 6 \][/tex]

### Conclusion
The value of [tex]\( m \)[/tex] is [tex]\( \boxed{6} \)[/tex].