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2 years ago

The perimeter of a regular hexagon is 78 cm .What will be the length of each side?

Mathematics

2 answers:

k0ka [10]2 years ago

7 0

Answer:

13 cm

Step-by-step explanation:

78/6=13

ipn [44]2 years ago

5 0

Answer:

13cm

Step-by-step explanation:

regular means the sides are equal
a hexagon has 6sides
78/6=13

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Two students from a group of eight boys and 12 girls are sent to represent the school in a parade.

Deffense [45]

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c. 62/95

Explanation

Probability is the chance of an event happening.

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2 years ago

Read 2 more answers

*Find the formula of the series 1+2²+3²+4²+....+n²*

Sophie [7]

The formula is $\frac{n(n+1)(2n+1)}{6}$

What are series?

In mathematics, we can describe a series as adding infinitely many numbers or quantities to a given starting number or amount.

We will find the formula as shown as below:

Let $S=1+2^2+3^2+4^2+................+n^2$

We know $(n+1)^3=n^3+3n^2+3n+1$

$(1+1)^3=1^3+3(1)^2+3(1)+1$

$(2+1)^3=2^3+3(2)^2+3(2)+1$

$(3+1)^3=3^3+3(3)^2+3(3)+1$

$(n+1)^3=n^3+3(n)^2+3(n)+1$

On adding

$2^3+3^3+4^3......(n+1)^3=(1^3+2^3+3^3+.....+n^3)+3(1^2+2^2+.....+n^2)+3(1+2+3....n)+(1+1+1+....+1)$

$2^3+3^3+4^3......(n+1)^3-(1^3+2^3+3^3+.....+n^3)=3S+\frac{3n(n+1)}{2}+(1+1+1+....+1)$

$(n+1)^3-1^3=3S+\frac{3n(n+1)}{2} +n$

$n^3+3(n)^2+3(n)+1-1=3S+\frac{3n(n+1)}{2} +n$

$2n^3+6n^2+6n=6S+3n^2+3n+2n$

$6S=2n^3+3n^2+n$

$6S=2n^2(n+1)+n(n+1)$

$6S=(n+1)(2n^2+n)$

$6S=n(n+1)(2n+1)$

$S=\frac{n(n+1)(2n+1)}{6}$

Hence, the formula is $\frac{n(n+1)(2n+1)}{6}$

Learn more about Series here:

brainly.com/question/24643676

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3 0

1 year ago

Explain how you can use the whole number expression 248÷4 to check that your answer to exercise to is reasonable

Aleksandr-060686 [28]

I got 62 because i just dived 248/4.

4 0

3 years ago