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Plane Geom Rev 11.2 - 11.3
供稿人: Plesek
Find the perimeter of an equilateral triangle
that has an apothem of 6.
12√3
36√3
108√3
36
Find the area of a square that has a radius of 8.
8√2
32√2
64
128
Find the length of one side of a regular hexagon
that has a radius of 4.
4
4√3
24
2
Find the apothem of a regular hexagon that has a
radius of 12.
6√3
12
12√3
6
Find the radius of an equilateral triangle that
has an apothem of 5.
5√3
10
10√3
5
Find the area of a square that has an apothem of 4.
16
32
64
8
The ratio of lengths of corresponding sides of two
similar pentagons is 16:9.  What is the ratio of their
areas?
16:9
32:18
256:81
4:3

The ratio of the areas of two similar pentagons is

16:9.  What is the ratio of their perimeters?

16:9
32:18
256:81
4:3
The area of one square is 9 while the area of
another square is 64.  Find the ratio of one side of
the larger square to a side of the smaller square.
3:8
8:3
9:64
64:9
The ratio of lengths of corresponding sides of two
similar rectangles is 3:5.  The larger rectangle has
an area of 75.  What is the area of the smaller
rectangle?
12
9
3
27
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