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3 years ago

Find the perimeter of a regular octagon if one side has a measure of 8cm A) 16 cm B) 56cm C) 64cm D) 72cm

Mathematics

2 answers:

zysi [14]3 years ago

8 0

C. 64cm
Hope this helps! :)

Vesna [10]3 years ago

5 0

C. 64cm. P=8a=8·8=64. I hope this helps you.

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Point M is on line segment LN. Given LN = 9, MN = 4x, and LM=5x

andrew-mc [135]

Answer:

MN = 4

Step-by-step explanation:

Given that L, M, N are collinear,

LN = 9,

MN = 4x

LM = 5x

Required:

Length of MN

SOLUTION:

To calculate the numerical length of MN, we need to find the value of x.

To find the value of x, generate an equation to solve for x as follows:

$LM + MN = LN$ (segment addition postulate)

$5x + 4x = 9$ (substitution)

Solve for x

$9x = 9$

Divide both sides by 9

$\frac{9x}{9} = \frac{9}{9}$

$x = 1$

MN = 4x

plug in the value of x

MN = 4(1) = 4

5 0

3 years ago

In △XYZ , XZ=9 , YZ=4 , and XY=7 .

Mamont248 [21]

Answer:

$A=6\sqrt{5}\ units^2$

Step-by-step explanation:

we know that

Heron's Formula is a method for calculating the area of a triangle when you know the lengths of all three sides.

$A=\sqrt{s(s-a)(s-b)(s-c)}$

where

a, b and c are the length sides of triangle

s is the semi-perimeter of triangle

we have

$a=9\ units,b=4\ units,c=7\ units$

Find the semi-perimeter s

$s=\frac{9+4+7}{2}=10\ units$

Find the area of triangle

$A=\sqrt{10(10-9)(10-4)(10-7)}$

$A=\sqrt{10(1)(6)(3)}$

$A=\sqrt{180}\ units^2$

Simplify

$A=6\sqrt{5}\ units^2$

8 0

3 years ago

What numbers are not square or even?

muminat

Answer:

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Odd and even square numbers

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4 years ago

1/3(12u-2) please help me solve

jeka94

Answer:

u = 1/6

Step-by-step explanation:

1 (12u - 2 )= 0

3×1 (12u-2) =0×3

12u -2 =0

12u = 2

12 12

u = 1

8 0

3 years ago

Let f(x) = −4(0.25)^x. The graph of g(x) = f(x)+k is shown below. Identify the value of k. k=

Nataliya [291]

You can use photomath it is a great app to find ONLY equations!

8 0

3 years ago

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