Answer:
Question 10.
Length of the side of the square = [tex]\sqrt{441} = 21[/tex]
By Pythagoras' Theorem,
Hypotenuse = [tex]\sqrt{21^{2} + 20^{2} }[/tex] (H > 0)
= 29 m
Ans: 29 m
Question 11.
By Pythagoras' Theorem,
Length of longer side of 42 km = 42- [tex]\sqrt{18^{2} - 15^{2} }[/tex] (L > 0)
= 32.050 km (5 s.f.)
By Pythagoras' Theorem,
Length of the unknown side = [tex]\sqrt{32.050^{2} + 15^{2} }[/tex] (L > 0)
= 35.4 km (3 s.f.)
Ans: 35 km
