3. CBED is a square because: A: all sides = 2V5 B: all angles = 90° C: BD CE = 2V10 D: BD bisects CE at (1, 3) E: All of the above. O D 31 3.

3. Quilt squares are cut on the diagonal to form triangular quilt pieces. The hypotenuse of the resulting triangles is 16 inches long. What is the side length of each piece? A. 16/2 С. 8/2 В. 8 D. 8V3

. Twenty-four 1cm × 1cm squares are used to tile a rectangle.              (a)   Find the dimensions of all possible rectangles.   (b) Which of the above rectangles in part (a) has the largest perimeter?

9. ABCD is a rectangle. If AC = 2x + 6 and diagonal BD = 10, what is x? A. 1 В. 2 C. 3. D. 4