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3 years ago

How many lines of reflectional symmetry does an equallaterial triangle have

Mathematics

2 answers:

Law Incorporation [45]3 years ago

7 0

From what i can tell, it would have Three Lines of Reflectional Symmetry due to its three vertices

Natasha2012 [34]3 years ago

6 0

It has 3 lien of symmetry because it is equal on all three sides

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In the ________ method, the distance between groups is defined as the distance between the closest pair of objects, where only p

andrew-mc [135]

Answer: single linkage clustering

Step-by-step explanation: because here

defining feature of the method is that distance between groups is defined as the distance between the closest pair of objects, where only pairs consisting of one object from each group are considered.

In the single linkage method, D(r,s) is computed as

D(r,s) = Min { d(i,j) : Where object i is in cluster r and object j is cluster s }

The distance between every possible object pair (i,j) is computed, where object i is in cluster r and object j is in cluster s. The minimum value of these distances is said to be the distance between clusters r and s. In other words, the distance between two clusters is given by the value of the shortest link between the clusters.

At each stage of hierarchical clustering, the clusters r and s , for which D(r,s) is minimum, are merged. In this case, those two clusters are merged such that the newly formed cluster, on average, will have minimum pairwise distances between the points.

8 0

3 years ago

a segment has endpoints at (1, -2) The midpoint is at (-4, -2). What are the cooordinates of the other endpoint?

vfiekz [6]

Answer:

coordinate of the other endpoint is (-9,-2)

Step-by-step explanation:

Given that a segment has endpoints at (1, -2). The midpoint is at (-4, -2).

Now we need to find about what are the coordinates of the other endpoint.

let the coordinates of other end points are (x,y)

Then mid point of (1,-2) and (x,y) is given by mid point formula:

$\left(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}\right)$

$\left(\frac{x+1}{2},\frac{y-2}{2}\right)=(-4,-2)$

$\Rightarrow \frac{x+1}{2}=-4, \frac{y-2}{2}=-2$

$\Rightarrow x+1=-8, y-2=-4$

$\Rightarrow x=-9, y=-2$

hence coordinate of the other endpoint is (-9,-2)

4 0

3 years ago

Kevin reads 5 pages in 15 minutes at this rate how many pages will he read in 45 minutes

Aleksandr-060686 [28]

Answer:

15 pages

Step-by-step explanation:

45/15=3

3x5=15

4 0

3 years ago

Add the two expressions <br><br> 3.8b - 7 and 2.9b + 9<br><br> enter your answer in simplified form

worty [1.4K]

Answer:

The answer would be 6.7b + 2

Step-by-step explanation:

In order to simplify this, simply add the like terms together.

3.8b + 2.9b = 6.7b

-7 + 9 = 2

Now just put those two together

6.7b + 2

6 0

3 years ago

Factoring Special Cases (400 - 36x^2)

const2013 [10]

Factor out a GCF of 4, then you are left with perfect squares.
4(100-9x^2)
Factor what is left as a difference of perfect squares (the outside and inside terms from FOIL should cancel out which is why each parenthesis has a different sign
f(10+3x)(10-3x)

5 0

3 years ago