Picture for proof

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"Prove: Any two corresponding altitudes of similar triangles have the same ration as the corresponding sides"

Can someone just help me to clarify how to draw the triangles; I’m not really good with drawings of proof, thanks
 
Draw one big triangle and a smaller one that look the same. (Same angles.) Lable the sides a, b & c and r*a, r*b & r*c.
Draw altitudes (h & h<sub>1</sub>)in them.
Prove h<sub>1</sub> = r*h
 
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