Which statements are true about the unknown side length in this right triangle? Check all that apply.
1. The equation a^2+(/13)^2=6^2 can be used to find the unknown length
2. The equation (/13)^2+b^2=6^2 can be used to find the unknown length
3.The equation (/13)^2+6^2=c^2 can be used to find the unknown length
4. The length of the unknown leg is /23 meters
5. The length of the unknown leg is 7 meters