Question

Television sets. What does it mean to refer to a 20-in TV set or a 25-in TV set? Such units refer to the diagonal of the screen. A 35-in TV set also has a width of 28 inches. What is the height in inches, of the 35-in TV?

Answer 1

you should use phythagoras:
A^2+B^2=C^2
Givem A=28 (width) and C=35 (diagonal), find B (length)

Answer 2

is the answer 441? I'm a bit confused.

Answer 3

B^2 is 441.
You need B

Answer 4

21

Answer 5

I squared 441. Was that the correct move?

Answer 6

B=21 is the correct answer.

Answer 7

Thank you :)

Answer 8

you didn't square 441, you took 441's square root , which is 21
sqrt(441) = 21

Answer 9

oops :)