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Mathematics 49 Online
OpenStudy (anonymous):

Find the ratio of the areas of figures I and II.

OpenStudy (anonymous):

OpenStudy (anonymous):

The first one is 2:3 the second one is 1:3

OpenStudy (anonymous):

how did you get that

OpenStudy (ddcamp):

The first problem is a ratio of areas in two similar figures. Remember, of the side lengths have a ratio of a:b, then the ares will have a ratio of a²:b² The side length of figure I is 3, and the side length of figure II is 5. If the lengths have a ratio of 3:5, what is the ratio of the areas?

OpenStudy (anonymous):

9:25

OpenStudy (ddcamp):

Good! For the second one, we can draw more triangles on the rectangle: |dw:1383882547084:dw|

OpenStudy (ddcamp):

|dw:1383882575437:dw|

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