Mr. Jacobs has three children: two girls (Sue and Karen) and on boy (David). After each meal, one child is chosen at random to wash dishes.
a) If the same child can be chosen for both lunch and dinner dish duty, construct a tree diagram or list a sample space of all the possible outcomes of who will wash dishes after lunch and dinner on Sunday.

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.

your answer   is c

step-by-step explanation:

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.