Answer: Option B and option D.
Step-by-step explanation:
We know that a quadrilateral is a 2-dimensional closed shape that has four sides.
By definition the diagonals of a quadrilateral are the lines that connect two non-adjacent vertices.
The following quadrilaterals have diagonals that are perpendicular to each other (also known as perpendicular bisector diagonals), which means that they form four angles of 90 degrees (right angles): <em>Rhombus and Square.</em>
Therefore the answers are: the option B and the option D.
Answer:
Step-by-step explanation:

Answer:
D
Step-by-step explanation:
x squared add up to 9x^2 and 5-5=0 so it has to be D
Answer:
yes
Step-by-step explanation:
A parallelogram is a quadrilateral is whose angles are all right angles
8 x 615 is 4920.
615
x. 8
______
put a 4 above the one and a 1 above the 6.