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Mathematics 15 Online
OpenStudy (anonymous):

http://static.k12.com/calms_media/media/1394500_1395000/1394519/1/c3c6934cbe815decd4975189821765701b0b7458/67515_FGA_U6_L12_V2_P.jpg

OpenStudy (mathstudent55):

I see the triangles. What is the question.

OpenStudy (anonymous):

What is the scale factor for the similar figures? A.1/6 B.1/3 C.2/3 D.3

OpenStudy (anonymous):

there

OpenStudy (anonymous):

@mathstudent55

OpenStudy (anonymous):

i think its D.3

OpenStudy (mathstudent55):

You're on the right track but not correct. Look at the figures. In the upper triangle, the original triangle, the upper side measures 18 cm. In the scaled image, the lower triangle, that same side now measures 6 cm. What do you multiply 18 by to get 6?

OpenStudy (anonymous):

6*3=18

OpenStudy (mathstudent55):

Correct, 6 times 3 is 18, but in this case, we are starting with 18, and we want to finish with 6. To go from 18 to 6, you need to divide 18 by 3. Dividing by 3 is the same as multiplying by 1/3. The answer is the scale factor is 1/3, not 3.

OpenStudy (anonymous):

oh ok thanks

OpenStudy (mathstudent55):

wlcm

OpenStudy (anonymous):

can you be my fan plz

OpenStudy (mathstudent55):

sure

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