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- In $\triangle ABC$, the slope of the line that joins the midpoints of sides $AB$ and $AC$ is $\cdots$

- In $\triangle ABC$, the length of the line that joins the midpoints of sides $AB$ and $AC$ is $\cdots$

- Let $\triangle ABC$ be such that $\angle A=90^{\circ}$. Then its orthocenter is located at $\cdots$?

- Let $\triangle ABC$ be such that $\angle A=90^{\circ}$. Then its circumcenter is located at $\cdots$?

- In which of the following quadrilaterals do the diagonals not intersect at $90^{\circ}$?

- A major difference between a square and a rhombus is that $\cdots$?

- A major difference between a rectangle and a square is that $\cdots$?

- In which of the following quadrilaterals do the diagonals bisect each other?

- A major difference between a kite and a trapezoid is that $\cdots$?

- Which of the following is an example of a parallelogram?