Answer:
141.4 cm
Step-by-step explanation:
Refer to the notations in the attached photo,
AG = d
Using Pythagoras Theorem:
In triangle ABC,
AC
=[tex] \sqrt{ {60}^{2} + {80}^{2} } [/tex]
=[tex] \sqrt{3600 + 6400} [/tex]
=[tex] \sqrt{10000} [/tex]
= 100 cm
∴ AC is 100 cm.
In triangle ACG,
d
=[tex] \sqrt{ {100}^{2} + {100}^{2} } [/tex]
=[tex] \sqrt{10000 + 10000} [/tex]
=[tex] \sqrt{20000} [/tex]
= 141.4 cm (cor. to the nearest tenth)
