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How tall is the lighthouse?

How tall is the lighthouse?-example-1
User Johane
by
7.5k points

1 Answer

4 votes

Answer:

≈200ft

Explanation:

first the small triangle is measured

9²+15²=y²

y²=306

y=√306

y≈17.5

now bc the two triangles are similar, just different in sizes, this is done

17.5/9=z/120

z=(17.5*120)/9

z≈233.3

now the x is calculated

x²=233.3²-120²

x²=40028.89

x≈200

User Matt Mazzola
by
7.1k points