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Geometry 18 Online
OpenStudy (jh1488345):

The vertices of ABC are A(-2,2) B(6,2) C(0,8). The perimeter of ABC is blank units, and its area is blank square units?

OpenStudy (eliesaab):

Notice that A and B have the same y coordinates 2

OpenStudy (eliesaab):

Hence AB is parallel to the x-axis

OpenStudy (eliesaab):

Since C(0,8) and the origin O=(0,0) then CO is perpendicular to AB

OpenStudy (eliesaab):

Let H be the point of intersection of CO and AB. What is CH? How long is CH?

OpenStudy (eliesaab):

You should be able to finish it now

OpenStudy (jh1488345):

Thanks @eliesaab

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