Question 1088575
I think they are assuming the photo is from directly above,
and there is no distortion of the lengths
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I can use proportions:
{{{ 3/5 = 150/a }}}
{{{ 3a = 5*150 }}}
{{{ 3a = 750 }}}
{{{ a = 250 }}} m
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{{{ 3/9 = 150/b }}}
{{{ 1/3 = 150/b }}}
{{{ b = 450 }}}
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The longest side is 450 m
The middle length is 250 m
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check:
{{{ 5/9 = 250/450 }}}
{{{ 5/9 = 50/90 }}}
{{{ 5/9 = 5/9 }}}
OK