Answer:
the unknown side of the triangle is ![2\sqrt{21}](https://tex.z-dn.net/?f=2%5Csqrt%7B21%7D)
Step-by-step explanation:
![a^2+b^2=c^2](https://tex.z-dn.net/?f=a%5E2%2Bb%5E2%3Dc%5E2)
![4^2+b^2=10^2](https://tex.z-dn.net/?f=4%5E2%2Bb%5E2%3D10%5E2)
![16+b^2=100](https://tex.z-dn.net/?f=16%2Bb%5E2%3D100)
![b^2=100-16](https://tex.z-dn.net/?f=b%5E2%3D100-16)
![b^2=84](https://tex.z-dn.net/?f=b%5E2%3D84)
or ![2\sqrt{21}](https://tex.z-dn.net/?f=2%5Csqrt%7B21%7D)
If the pentagon is rotated 360° about the origin, that means the new figure will be exactly in the same position as the original image, because a rotation of 360° about the origin doesn't change the figure position or orientation.
So, if the vertex was located at (10, -8), the new figure will also have a vertex located at (10, -8).
Therefore the correct option is the fourth one.
Answer:
25
Step-by-step explanation:
8x+6 would still be 8x+6 because you cannot add 6 to 8x. remember, 8x means x, 8 times.