Day 64 Assignment (11.5)

The scale factor of two similar figures is 4 : 5. What is the ratio of their perimeters?

• 4 : 5

• 16 : 25

• 64 : 125

• 8 : 10

The scale factor of two similar figures is 4 : 5. What could be a pair of corresponding sides?

• 4 : 6

• 16 : 25

• 64 : 125

• 8 : 10

What does similar mean?

• same shape and same size

• same size

• same shape but not necessarily the same size.

• neither

Which statement BEST describes a ratio.

• A number

• A comparison of two quantities using division.

• A comparison

• A relationship.

If a rectangle is drawn and another rectangle is drawn so that the sides are twice as big as the first rectangle, what happens to the area of the second rectangle?

• doubles

• triples

• quadruples

• not enough information

The figures are similar (red to blue). Find the scale factor & the area ratio.

• Scale factor : 4/7

  Area: 16/49

• Scale factor: 15/8

  Area: 30/16

• Scale factor: 40/4

  Area: 19/15

• Scale factor: 18/40

  Area: 15/30

The two triangles are similar. Find the ratios (red to blue) of the perimeters and of the areas.

• Perimeter: 4/6

  Area: 25/64

• Perimeter: 4/16

  Area: 8/16

• Perimeter: 5/8

  Area: 25/64

• Perimeter: 14/9

  Area: 121/64

  Area:

Find the ratio (blue to red) of the perimeter.

• 4/7
• 7/4
• 49/16
• 16/49

The figures shown are similar. The areas of each figure is given.

What is the ratio of the side length of the smaller triangle to the larger triangle?

• 4:49

• 2:7

• 1:7

• 1:25

The figures below are similar. The labeled sides are corresponding.

What is the ratio of the areas of the smaller pentagon to the larger pentagon?

• 9:5

• 25:81

• 5:9

• 81:25