How to know if angles are adjacent to each other

Adam plans to choose a video game from the section of the store where everything is 75% off. he writes the expression d-0.75d to find the sale price of the game if the original price is d dollars. gena correctly writes another expression, 0.25d, that will also find the sale price of the game if the original price is d dollars. use the drop down menus to explain each part of adams and rena's expression

Find the area of the triangle shown 3 by 6

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?