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Ugo [173]
3 years ago
10

if a shape is a regular octagon with eight sides which of the following must be true Check all that apply A=it is symmetrical B=

it has eight lines of symmetry C=it has reflectional symmetry and D=it has exactly one line of symmetry
Mathematics
2 answers:
pentagon [3]3 years ago
6 0
The answer to this question is the following:
A. It is symmetrical
B. It has eight lines of symmetry
C. It has reflection symmetry

Since the given figure is a regular polygon which is an octagon, we have eight equal sides and they are all symmetrical (8 lines that are symmetrical).
Doss [256]3 years ago
4 0

Answer: A. It is symmetrical.

B. It has eight lines of symmetry

C. It has reflectional symmetry

Step-by-step explanation:

A regular octagon has 8 equal sides.

The line of symmetry or reflectional symmetry is an imaginary line that divides a image into equal halves.

A regular octagon has 8 line of symmetry which divides the octagon into equal halves.

(4 from the vertices of the octagon and 4 from the middle points of the edges of the octagon.)

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Solving 6x²+9x-1=0 by completing the square root method produces an equation in the form of (x+h)²=k find H and K
marishachu [46]

The value of h is 9/12 and the value of k is 35/48

<h3>How to solve the equation?</h3>

The equation is given as:

6x^2 +9x - 1 = 0

Add 1 to both sides of the equations

6x^2 +9x - 1 + 1= 0 + 1

Evaluate the sum

6x^2 +9x =  1

Divide through the equation by 6

x^2 +9/6x =  1/6

Take the coefficient of x

k = 9/6

Divide by 2

k/2 = 9/12

Square both sides

(k/2)^2 = (9/12)^2

So, we add (9/12)^2 to both sides of the equation x^2 +9/6x =  1/6

x^2 +9/6x + (9/12)^2 =  1/6 + (9/12)^2

Next, we express the left-hand side as a perfect square

(x^2 + 9/12)^2 = 1/6 + (9/12)^2

The form of the equation is given as:

(x + h)^2 = k

So, we have:

h = 9/12

k = 1/6 + (9/12)^2

Simplify

k = 1/6 + (3/4)^2

Evaluate the exponent

k = 1/6 + 9/16

This gives

k = (8 + 27)/48

Evaluate

k = 35/48

Hence, the value of h is 9/12 and the value of k is 35/48

Read more about completing the square at:

brainly.com/question/4331586

#SPJ1

5 0
1 year ago
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