Find a Point that Partitions a Segment in a Given Ratio a:b

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Presentation transcript:

Find a Point that Partitions a Segment in a Given Ratio a:b

Find the coordinates of P along the directed line segment AB so that the ratio of AP to PB is 1 to 2. In order to divide the segment in the ratio of 1 to 2, think of dividing the segment into 1 + 2 or 3 congruent pieces.

A(3, 4), B(6, 10); 1 to 2. 3 AB has a rise of 6. 6 AB has a run of 3.

A(3, 4), B(6, 10); 1 to 2. To find the coordinates of point P… 6 3

Example 1: Find the coordinates of point P along the directed line segment AB so that AP to PB is the given ratio. A(-5, -4), B(5, 1); 4 to 1.

Example 4: Find the coordinates of point P along the directed line segment AB so that AP to PB is the given ratio. A(-2, -4), B(6, 1); 3 to 2.

Example 2: Find the coordinates of point P along the directed line segment AB so that AP to PB is the given ratio. A(-2, 0), B(-5, -9); 2 to 1. Order matters: Notice the rise and run are negative numbers

Example 2: Find the coordinates of point P along the directed line segment AB so that AP to PB is the given ratio. A(-2, 1), B(4, 5); 3 to 7.

CW/HW