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MariettaO [177]
3 years ago
15

How many lines of symmetry does this polygon have?

Mathematics
1 answer:
Iteru [2.4K]3 years ago
7 0

Answer:

I believe there are only 5...

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Mrs.bain earns 30,483 per year how money does she earn in one month my entire math grade depends on this one answer please help
mixer [17]
30483/12
=$2540.25
Hope this helps
8 0
3 years ago
Please help need answer for a quiz
torisob [31]

Answer:

first one with -1...21

Step-by-step explanation:

only one that follows quadratic formula format

5 0
3 years ago
The perimeter of a particular square and the circumference of a particular circle are equal. What is the ratio of the area of th
oksano4ka [1.4K]
<h2>Ratio of area of the square to the area of the circle = π/4</h2>

Step-by-step explanation:

Let the side of square be a and radius of circle be r.

The perimeter of a particular square and the circumference of a particular circle are equal.

Perimeter of square = 4 x a = 4a

Circumference of circle = 2πr

Given that

                      4a = 2πr

                        a=\frac{\pi r}{2}

We need to find the ratio of the area of the square to the area of the circle.

Area of the square = a²

Area of the circle = πr²

\texttt{Ratio of area of the square to the area of the circle =}\frac{a^2}{\pi r^2}\\\\\texttt{Ratio of area of the square to the area of the circle =}\frac{\left ( \frac{\pi r}{2}\right )^2}{\pi r^2}\\\\\texttt{Ratio of area of the square to the area of the circle = }\frac{\pi}{4}

Ratio of area of the square to the area of the circle = π/4

6 0
3 years ago
The photo is attached
aleksley [76]

D

using the double - angle identity

cos (2A) = cos² A - sin² A = 2cos² A - 1 = 1 - 2sin² A

the right side = 1 - 2sin² (112.5° ) with A = 22.5°

hence 2A = 2 × 22.5° = 45°

thus cos 45° = 1 - 2sin² ( 22.5°)


7 0
4 years ago
What is 7(-3). I am confuse and don't understand.
emmasim [6.3K]
7(-3) is an example of multiplication. What the question wants you to do is multiply the outside number (7) by the inside number (-3).
Basically you are just multiplying -3 x 7.
Your product is -21
7 0
3 years ago
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