Proof triangles i know that ad is congruent with dc because of the definition of a midpoint the line segment bd is part of both triangles. i don't know the right way to say that that side of the triangle is the same in both tri angles angles a and c are congruent is showing that two sides are the same enough to say the triangles are the same ?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.