CPM Homework Help : APCALC Problem 1-201

Shehazana, who is $5.5$ feet tall, is walking toward a $20$ -foot tall streetlight. Write an equation for the length of her shadow, $x$ , in terms of the distance, $d$ , she is from the pole. Visualize this situation using the .

Right triangle, vertical leg shown as a light pole, labeled 20 feet, hypotenuse is dashed, horizontal segment, between hypotenuse & horizontal leg, shown as a person running, divides horizontal leg into 2 unequal parts, left section labeled, d, right section labeled, x.

Hint:

Do you see the similar right triangles in this diagram? Recall that similar triangles have proportional sides. Set up a proportion and solve for $x$ .

More Help:

$\frac{5.5}{20} = \frac{x}{d}$

Use the eTool below to visualize this situation.
Click the link at right for the full version of the eTool: Calc 1-201 HW eTool