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| PAGE: 452 | SET: Exercises | PROBLEM: 6 |
Graph the coordinate plane and locate the points A and B. 
lies on vertical gridline.
Since triangle ABD has right angle at B, 
is perpendicular to 
.
_,B(8,3)_and_locate_the_point)D_in_quadrant_1.gif)
Find the length of from the graph.
Since is the shorter leg, 
is the longer leg.
Triangle ABD is a 30°- 60°- 90° triangle.
The 30°- 60°- 90° triangle has the property that the length of its longer leg is
times to the length of the shorter leg.
(Substitute AB = 3)
(Multiply)
The x-coordinate of the point D is 
or 13.2.
The y-coordinate of the point D is as same as y-coordinate of the point B.
The coordinates of the point D are 
or about 
.
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