This week we begin our discussion on ratios, rates, and proportions. What proportion of your time per week will you use to work on assignments for this course? • Express in ratio form your time spent working in ALEKS this week compared to time spent watching TV, movies, or browsing the internet. • Explain how the rate of change for time spent working in ALEKS might change if you watched three fewer television shows next week. man

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 .