kyle9797 kyle9797
  • 01-04-2020
  • Mathematics
contestada

What is AB?
Answer exactly, using a radical if needed

What is AB Answer exactly using a radical if needed class=

Respuesta :

jimrgrant1 jimrgrant1
  • 01-04-2020

Answer:

AB = 7[tex]\sqrt{2}[/tex]

Step-by-step explanation:

Using Pythagoras' identity on the right triangle.

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² = 7² + 7² = 49 + 49 = 98 ( take the square root of both sides )

x = [tex]\sqrt{98}[/tex] = [tex]\sqrt{49(2)}[/tex] = [tex]\sqrt{49}[/tex] × [tex]\sqrt{2}[/tex] = 7[tex]\sqrt{2}[/tex]

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