Are all of the angles in a rhombus 90 degrees?

no a rhombus doesn't have 4 right angles

a right angle=90 degrees

not always

Step by step explanation:

if one is 90 degrees, then yes

If you have one at 89 degrees, for example, then the corresponding angle would be 91 degrees

where is the figure

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column