The question is an illustration of multiplication model.
The multiplication model is:
From the figure, the shaded portions are:
So, the multiplication model represents:
This gives
Express as decimal
Hence, the multiplication model is:
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Answer:
This is because mathematics uses some theories that helps to change words to equations. for example, a tree of height 50m makes a shadow on the ground. an observer standing at angle of 30 degrees, calculate the distance of the man to the tree. we use the the formula, tan (30)=opp/adj