Question

Question #252d4

Answer 1

a=2.76

Explanation:

Using Pythagoras

`c^2=a^2+b^2`

`:. a^2+b^2=c^2`

`:.a^2=c^2-b^2`

`:. a^2=3.12^2-1.45^2`

`:.a^2=9.7344-2.1025`

`:.a^2=7.6319`

`:.a= sqrt 7.6319`

`:.a=2.763`

check:

`:.c^2=1.45^2+2.763^2`

`:.c=sqrt(1.45^2+2.763^2)`

`:.c=sqrt(2.1025+7.6176)`

`:.c=sqrt9.7201`

`:.c=3.118` or 3.12