Answer:
A. 24 units
Explanation:
The perimeter of the triangle RST is equal to the sum of their sides.
We know that RS = 8 units and ST = 6 units.
Then, by the Pythagorean theorem, we can calculate the length of side RT as follows
[tex]\begin{gathered} RT=\sqrt{8^2+6^2} \\ \\ RT=\sqrt{64+36} \\ \\ RT=\sqrt{100} \\ \\ RT=10 \end{gathered}[/tex]
Then, the perimeter is equal to
Perimeter = RS + ST + RT
Perimeter = 8 + 6 + 10
Perimeter = 24
So, the answer is A. 24 units
