Question

If the length of a rectangular television screen is 20 inches and its height is 15 inches,
what is the length of its diagonal, in inches?

Please help me! Im sick and i dont understand this and its due in an hour! :/

Answer 1

Use the Pythagorean theorem: 

C = √[a^2 + b^2] 
C = √[(20^2 + 15^2] 
C =√[400 + 225] 
C = √(625) 
C = 25 inches 

Answer: 3.25 inches ✔️