The ratio of the perimeter of square rstu to the perimeter of square wxyz is 1 to 2. the area of square rstu is 81 square inches. what is the length of the diagonal of square wxyz?

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Which statement is true about a number and its additive inverse? a. their product is always one. b. their sum is always one. c. they are always reciprocals of each other. d. their sum is always zero.

Which of these side lengths could form a triangle a) 2 cm , 2 cm , 4 cm b) 3 cm , 5 cm , 10 cm c) 3 cm , 4 cm , 5 cm d) 4 cm , 8 cm , 15 cm