729 is 3 to the 5th power
3 x 3 x 3 x 3 x 3 is 729
Sometimes, because if the number is negative, the opposite is greater, but if the number is positive, the opposite is smaller.
Some of the important "given" information is outside of the photo.
We need to know that the two triangles are similar.
And we need to know that the WHAT ? of angle M is 9/40.
