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3 years ago

How are the two angles the same?

Mathematics

1 answer:

tino4ka555 [31]3 years ago

8 0

Answer:

if ABCD is a rhombus then the diagonal of rhombus bisect it into two equal triangles.

Step-by-step explanation:

In triangles ABC and CDA,

AB= CD (S) because rhombus has equal sides.
BC = AD (S) as as reason 1.
AC= AC (S) being common side of both triangles

so the triangles are congruent to each other by S.S.S. fact/ axiom

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Given the matrices: 1 2 A= 1 -1 2 1 1 B= 3 4 Calculate AB: C11 C12 [2.1] х 1 2 3 4 C21 C22 C11 = C12 = -2 C22 - C215 DONE

eduard

Answer:

$\:c_{11}=-2,\:\:\:c_{12}=-2$

$\:c_{21}=5,\:\:\:c_{22}=8$

Step-by-step explanation:

Given the matrices

$A=\begin{pmatrix}1&-1\\ 2&1\end{pmatrix}$

$B=\begin{pmatrix}1&2\\ \:3&4\end{pmatrix}$

Calculating AB:

$\begin{pmatrix}1&-1\\ \:\:2&1\end{pmatrix}\times \:\begin{pmatrix}1&2\\ \:\:3&4\end{pmatrix}=\begin{pmatrix}c_{11}&c_{12}\\ \:\:\:c_{21}&c_{22}\end{pmatrix}$

Multiply the rows of the first matrix by the columns of the second matrix

$=\begin{pmatrix}1\cdot \:1+\left(-1\right)\cdot \:3&1\cdot \:2+\left(-1\right)\cdot \:4\\ 2\cdot \:1+1\cdot \:3&2\cdot \:2+1\cdot \:4\end{pmatrix}$

$=\begin{pmatrix}-2&-2\\ 5&8\end{pmatrix}$

Hence,

$\begin{pmatrix}c_{11}&c_{12}\\ \:\:\:c_{21}&c_{22}\end{pmatrix}=\begin{pmatrix}-2&-2\\ \:5&8\end{pmatrix}$

Therefore,

$\:c_{11}=-2,\:\:\:c_{12}=-2$

$\:c_{21}=5,\:\:\:c_{22}=8$

5 0

3 years ago

Read 2 more answers

If i have a lawn mower for 3 $ and its 50 percent of what is the orginial price ?

OleMash [197]

Answer:

Step-by-step explanation:

5 0

2 years ago

I need help I don’t know this question

murzikaleks [220]

So singlehandedly, November has 25% of the total rain in one year of New York's, which is 62.51 inches.

So, November receives: *percentage* x *total*
= 25% x 62.51 = 15.6275 in

------------------------------------------------------------------------------------------------------
So, in November, New Yorks receives 25% of total rain in one year, which is 15.6275 inches.
------------------------------------------------------------------------------------------------------

I'd like my Brainliest pls ;W;

4 0

3 years ago

A cone is a polyhedron.<br> A.)True <br> B.)False

Marina86 [1]

A.) True

is your answer

3 0

3 years ago

Read 2 more answers

What is the value of x in the equation 4x + 8y =40, when y=0.8

Naily [24]

Answer:

x= 8.4

Step-by-step explanation:

y=0.8

4x + 8y =40

4x + ( 8 x 0.8) = 40

4x + (6.4) =40

4x = 40 - 6.4

4x = 33.6

x = 8.4

3 0

3 years ago