Given that abcd is a rhombus, what is the value of x?

we know that

The rhombus has the following properties:

Consecutive angles are supplementary

The diagonals bisect the angles

so

Divide by both sides

solve for x

therefore

the answer is the option B

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.  

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.