Which statements are true about the unknown length in this triangle? Check all that apply 1) The equation a^2+( square root13)^2=8^2 can be used to find the unknown length

2) The equation ( square root13)^2+b^2=8^2 can be used to find the unknown length

3) the equation square root13)^2+8^2=c^2 can be used to find the unknown length

4) The length of the unknown leg is square root23 meters

5) the length of the unknown leg is 7 meters