standard_description: Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in real-world and mathematical problems in two and three dimensions.
problem_activity: Are the following two expressions equivalent? Explain your reasoning using the properties of operations. Provide examples to support your reasoning.
Expression 1:
$${(x-y)-z }$$
Expression 2:
$${x-(y-z)}$$


aligns: no