3.(05.01 lc)
hillary is using the figure shown below to prove pythagorean theorem using triangle similarity:
in the given triangle abc, angle a is 90° and segment ad is perpendicular to segment bc.
which of these could be a step to prove that bc2 - ab2 + ac2; (6 points)
by the addition property of equality, ac2 plus ad2 - ab multiplied by dc plus ad2
by the addition property of equality, ac? plus ad2 - bc multiplied by dc plus ad2
by the addition property of equality, ac2 plus ab2 - ab multiplied by dc plus ab
by the addition property of equality, ac plus ab2 - bc multiplied by dc plus ab2,

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.