algebra
posted by Valentine .
Television sets. What does it mean to refer to a 20in TV set or a 25in TV set? Such units refer to the diagonal of the screen. A 10in TV set also has a width of 8 inches. What is its height?

Pythagorean Theorem:
a^2 + b^2 = c^2
8^2 + b^2 = 10^2
64 + b^2 = 100
b^2 = 100  64
b^2 = 36
b = 6 inches