Triangle bcd is rotated 80° clockwise about the origin to form δklm. if m∠klm = 30°, what is m∠bcd?

The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. how many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?