Question

A certain television is advertised as a 90- inch Tv ( the diagonal length).

Answer 1

Answer:

The width is 64.3 inches

Step-by-step explanation:

Given

$d = 90$ --- diagonal

$h = 63$ --- height

Required

Determine the width (w) of the TV

To do this, we make use of Pythagoras theorem which is illustrated as:

$d^2 = h^2 + w^2$

So, we have:

$90^2 = 63^2 + w^2$

Evaluate all squares

$8100 = 3969 + w^2$

Collect like terms

$w^2 = 8100 - 3969$

$w^2 = 4131$

Take positive square roots of both sides

$w = \sqrt{4131$

$w = 64.3$ -- approximated