Coordinates written as (r, theta) where r is three magnitude are called coordinates

Which best explains why this triangle is or is not a right triangle?

Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?

Last month, leonhard euler's watch kiosk at the mall had total sales of $9,489. merchandise totaling $225 was returned. the goods that were sold cost leonhard euler's $5,481. operating expenses for the moth were $992. what was the gross profit on sales?