Which statement about rectangles is true? O A. All rectangles are rhombuses. B. All rectangles are parallelograms. Oc. All rectangles have obtuse angles. O D. All rectangles have acute angles.

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.