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Geometry 18 Online
OpenStudy (anonymous):

The figure below shows line t, which intersects segment AB: Segment AB is intersected by line t. Point C is on line t. In the image above, line t is a perpendicular bisector and angle 4 is congruent to angle 6. Write a paragraph to prove that point C is equidistant from points A and B.

OpenStudy (mathstudent55):

Is there a figure?

OpenStudy (anonymous):

OpenStudy (mathstudent55):

You need to prove triangles congruent and then use CPCTC.

OpenStudy (mathstudent55):

First, draw segments AC and BC. Also, call the point of intersection of line t and segment AB, point D. Then since point T is the perpendicular bisector of segment AB, point D is the midpoint of segment AB.

OpenStudy (mathstudent55):

Segments AD and BD are congruent because D is the midpoint of segment AB.

OpenStudy (mathstudent55):

Name angles 1 and 2 as shown below. Angles 1 and 2 are right angles because the lines are perpendicular. Angles 1 and 2 are congruent because all right angles are congruent. |dw:1438042325361:dw|

OpenStudy (mathstudent55):

Segment DC is congruent to segment DC because of reflexive property of congruence. Using SAS, triangles ACD and BCD are congruent. By CPCTC, sides CA and CB are congruent. Point C is equidistant from points A amd B.

OpenStudy (anonymous):

Oh my gosh thank you so much your the first person to explain it to me while making sense thanks a lot.

OpenStudy (mathstudent55):

You are welcome. I'm glad it makes sense to you .

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