Explanation: 1- Slope of DE: Assume point D is (x1, y1) and point E is (x2, y2). To get the slope of DE, we will substitute with the given points in the following formula: slope of DE = (y2-y1) / (x2-x1) = -2
1- Slope of AC: Assume point A is (x1, y1) and point C is (x2, y2). To get the slope of AC, we will substitute with the given points in the following formula: slope of AC = (y2-y1) / (x2-x1) = -2
3- Therefore, the easiest way to get the slope of any line is by using the slope formula.
4- Note that since the two slopes are equal, this means that the two lines are parallel.
The cake is twice as long as it is wide, so that means cut half the cake (6 3/4 x 6 3/4) into 9 pieces, each with a side of 1/3 * 6 3/4 = 2 1/4 inches.