The city wants to know if buying a giant water fall would be cost effective. They want to get an idea of how many would pay to use the slide. Which sample would give the city the most useful results? A. 25 people of all ages
B. 100 people of all ages
C. 30 people at city park
D. 100 people at city park

Given: abcd is a square. prove: ac ? bd. we are given that abcd is a square. if we consider triangle aeb and triangle aed, we see that side is congruent to side ad because sides of a square are congruent. we know that side ae is congruent to side ae by using the . finally, we know that side de is congruent to side because the diagonals of a square bisect each other. therefore, triangle aeb is congruent to triangle aed by congruency. we see that angle aed and angle aeb are a linear pair, and congruent by cpctc. thus, the measure of these angles will be 90°, and diagonal ac is perpendicular to diagonal bd by the .