WHICH OF THE FOLLOWING ARE NECESSARY WHEN PROVING THAT THE DIAGONALS OF A RECTANGLE ARE CONGRUENT? CHECK ALL THAT APPLY a) opposite sides are perpendicular
b) opposite sides are congruent
c) corresponding parts of similar triangles are similar triangles are similar
d) Corresponding parts of congruent triangles are congruent.

What is the absolute value of the complex number -4-sqrt2i

What is the probability of throwing several dice with sum equal to 6 (six)? show the ways of possibilities for sum 6 (as the numerator) and the ways of throwing n dices for n = 1, 2, 3, 4 or 5 as denominator for all the questions to earn full credits. (a)throw one die, (b) throw two dice, (c) throw three dice (d) throw 4 dice, (e) throw 5 dice

What number is 7 units left of -15?