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4 years ago

Which figure has an order 3 rotational symmetry

Mathematics

1 answer:

Neko [114]4 years ago

8 0

Answer:

Equilateral triangle

Equilateral triangle has an order 3 rotational symmetry. In geometry, a figure has rotational symmetry if it moves onto itself under rotation about an angle at center of rotation.

Step-by-step explanation:

Equilateral triangle has an order 3 rotational symmetry. In geometry, a figure has rotational symmetry if it moves onto itself under rotation about an angle at center of rotation. Hope this helps! :)

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Susan is stacking boxes on a shelf each box is shaped like a rectangular prism it has a length of 2 feet a width of 15 inches an

TEA [102]

I would say you can stack 10 boxes on the shelf

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4 years ago

Question 7

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6.2

Step-by-step explanation:

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3 years ago

A population is increasing 4% per year. Identify the growth factor that could be used to model the population.

polet [3.4K]

The growth factor that could be used to model the population will be 1.04. Then the correct option is D.

<h3>What is an exponent?</h3>

Consider the function:

y = a (1 ± r) ˣ

Where x is the number of times this growth/decay occurs, a = initial amount, and r = fraction by which this growth/decay occurs.

If there is a plus sign, then there is exponential growth happening by r fraction or 100r %.

If there is a minus sign, then there is exponential decay happening by r fraction or 100r %.

The population is increasing by 4% per year.

Then the growth factor that could be used to model the population will be

Growth factor = (1 + 4%)

Growth factor = (1 + 0.04)

Growth factor = 1.04

The growth factor that could be used to model the population will be 1.04.

Then the correct option is D.

More about the exponent link is given below.

brainly.com/question/5497425

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5 0

2 years ago

Consider a= ⟨−2,5,1⟩, b= ⟨−5,2,−5⟩ and c= ⟨−1,−5,4⟩. Find the angles between the following vectors: The angle between a and b is

lianna [129]

Answer:

$cos^{-1}(\frac{\sqrt 5}{6})$

Step-by-step explanation:

We are given that

$a=,b=$ and c=<-1,-5,4>

We have to find the angles between a and b .

$\mid a\mid=\sqrt{(-2)^2+(5)^2+(1)^2}=\sqrt{30}$

$\mid b\mid=\sqrt{(-5)^2+(2)^2+(5)^2}=3\sqrt{6}$

$a\cdot b=\cdot =10+10-5=15$

Angle between two vectors a and b is given by

$cos\theta=\frac{a\cdot b}{\mid a\mid \mid b\mid }$

Using the formula

$cos\theta=\frac{15}{\sqrt{30}\times 3\sqrt{6}}$

$cos\theta=\frac{5}{6\sqrt{5}}$

$cos\theta=\frac{5\times \sqrt 5}{6\times (\sqrt 5)^2}=\frac{\sqrt 5}{6}$

$\theta=cos^{-1}(\frac{\sqrt 5}{6})$

Hence, the angle between a and b= $cos^{-1}(\frac{\sqrt 5}{6})$

6 0

4 years ago

Please help due today

Alex17521 [72]

Answer:

x = 8

ABD = 46 degrees

DBC = 44 degrees

Step-by-step explanation:

Complementary Angles: two angles who’s sum together is 90 degrees

2x + 30 + 3x + 20 = 90

5x + 50 = 90

5x (+ 50 - 50) = 90 - 50

5x = 40

5x/5 = 40/5

x = 8

2(8) + 30

16 + 30

3(8) + 20

24 + 20

ABD = 46

DBC = 44

This is what I did in the photo

6 0

3 years ago