Mathcounts National Sprint Round Problems And Solutions

Without a calculator, practice:

In trapezoid ABCD, AB∥CD, AB=10, CD=6, height=4. Find area of triangle formed by diagonals intersection and vertices? But typical: Find distance between midpoints of diagonals. Solution: The segment connecting midpoints of diagonals = (AB-CD)/2 = (10-6)/2 = 2. Mathcounts National Sprint Round Problems And Solutions