Two planes α and β are intersecting, the angle between them being 45 °. Consider a square ABCD with a side of 4 cm in the α plane, where AB is a segment of the intersection of the α and β and 'D'C planes the orthogonal projection of CD on β. a) Draw a picture illustrating the problem.
b) Determine the perimeter and area of the ABC'D 'quadrilateral.

Describe the relationship between the angles of similar triangles and the sides of similar triangles

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.