The slant height of the pyramid can be calculated using Pythagoras theorem. Therefore, the slant height is 6.7 mm
The slant height x, can be found using Pythagoras theorem,
Therefore,
c² = a² + b²
where
Therefore,
x² = 4.5² + 5²
x² = 20.25 + 25
x² = 45.25
x = √45.25
x = 6.72681202354
x = 6.7 mm
learn more on pyramid here: https://brainly.com/question/11805304
#SPJ1