I'm so confused by geometry can you please help me?

8.27.W - Lesson: Formulas in Three Dimensions, Part 1 Formulas in Three Dimensions, Part 1 Question 3: 20 pts - The diagonal of a cube is 28 cm. Identify the length of an edge. Round to the nearest tenth, if necessary 19.4 cm 28 om 19.8 om 16.2 om Question 4: 20 pts Find the length of the diagonal of an 8cinx6cin x 10cin rectangular prism. Round to the nearest tenth. 10.5 cm 17.5 cm O 14.1 cm 19.7 am Question 5: 20 pts A rectangular prism has a base of 18 cm by 15 cm and a diagonal of 25 cm. Identify its height. Round to the nearest tenth. O 34.3 om 34.2 om 2.8 cm Progress 0's 8.7 am * Previous Type here to search e