Weekly Review #13 Geometry

There are 2 similar rectangles made up of square tiles.  Rectangle A measures 8 tiles wide and 10 tiles long.  The side length of each tile is one unit. What is the perimeter if rectangle B of the width measures 12 tiles?

• 15 units
• 54 units
• 30 units
• 52 units

An Olympic size swimming pool has a length of 50m and a width of 25m.  Elizabeth wants to build a similar pool.  If her pool has a width of 6.25m, what is the length of the pool?

• 12.5 cm
• 3.125 cm
• 100 cm
• 25 cm

Sides in similar figures must be proportional.  

• True
• False 

The pair of figures is similar. Find the missing side.

• x = 12
• x = 3
• x = 40
• x = 4

Are the following similar? Why or why not?

• Yes
• No, the corresponding angles are not equal.
• No, the ratios of the corresponding sides are not equal.

Review the picture.  Find the missing side measurement in the picture using a proportion.

• w = 18 m
• w = 6 m
• 6 m
• w = 0.16 m

If the ratio of 2 round dinner plates is 2 : 5, what is the ratio of their areas?

• 2 : 5

• 1 : 5

• 4 : 10

• 4 : 25

Two hexagons are similar with a scale factor of 4/5. If the area of the larger hexagon is 20, what is the area of the smaller hexagon?

• 10.24

• 12.8

• 16

• 25

A rectangular garden is 45 ft wide and 70 ft long. On a blueprint, the width is 9 in. Identify the length on the blueprint. 

• 7 in
• 9 in
• 12 in
• 14 in

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