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gladu [14]
3 years ago
7

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,

  1. AB= CD (S) because rhombus has equal sides.
  2. BC = AD (S) as as reason 1.
  3. 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:

$6

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
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