4. In the figure below, ABC is a right triangle. The length of
AB is 6 units and the length of CB is 3 units. What is the length, in
units, of AC?

4 In the figure below ABC is a right triangle The length of AB is 6 units and the length of CB is 3 units What is the length in units of AC class=

Respuesta :

Answer:

Length of the side AC = [tex]3  \sqrt{3}[/tex] units

Step-by-step explanation:

The given triangle ABC is a right triangle.

Here,   AB =   6 units ( hypotenuse)

CB = 3 units (base)

Now, as the triangle is a right triangle, so by

PYTHAGORAS THEOREM

In a right triangle,

[tex](Base)^{2}  + (Perpendicular)^{2}  = (Hypotenuse)^{2}[/tex]

So, here in ΔABC: [tex](BC)^{2}  + (AC)^{2}  = (AB)^{2}[/tex]

or, [tex](3)^{2}  + (AC)^{2}  = (6)^{2}[/tex]

⇒[tex]AC = \sqrt{36 - 9}  =  \sqrt{27} = 3  \sqrt{3}[/tex]

or, the length of the side AC = [tex]3  \sqrt{3}[/tex] units

Answer:

[tex]\textbf{The length of $AC$ = \large{$3\sqrt{3}$}}[/tex]

Step-by-step explanation:

Use Pythagoras Theorem.

For any right-angled triangle, with sides, [tex]\textup{$a, b, c$ we have:\\}[/tex]

[tex][tex]\begin{centre}$ a^2 + b^2 = c^2 $ \\\end{centre}[/tex][/tex]

where, [tex]$a , b $[/tex] are the length of the sides and [tex]$c$[/tex] is the hypotenuse.

Here, [tex]$AB$[/tex] is the hypotenuse and [tex]$AC$[/tex] and [tex]$CB$[/tex] are its sides. Therefore from Pythagoras Theorem we have:

[tex]$6^2 = 3^2 + AC^2$\\$\implies 36 = 9 + AC^2 $\\$\implies AC^2 = 27$\\$\implies AC = \sqrt{27} = 3\sqrt{3} \hspace{25mm} \textup{(Eliminating -27 as distance cannot be negative)}[/tex]

So, we say the length of the other side [tex]$AC$[/tex] is [tex]$3\sqrt{3}$[/tex] units.