The size of a TV screen is the length of the diagonal.
a. A TV screen is 70 cm wide and 39 cm high.
Show that this is an 80 cm screen.
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Step-by-step explanation:
let, diagonal of tv screen is = d
given length = 70
wide = 39
the tv is rectangle size so all angels are 90 °
Therefore, d = √( 70 square + 39 square)
= √( 4900 + 1521)
= √ ( 6421)
= 80.131 cm
Therefore, size of tv screen is 80 cm
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