Measurements Of Polygons And Circles Worksheets - Lance Mangham, 6th Grade Math, Carroll Isd Page 33
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40Activity 10-25: The Margaret Hunt Hill Bridge
Name:
The Margaret Hunt Bridge was completed near downtown Dallas in March 2012, almost five years after
construction began. The bridge cost $182 million to build and it was made out of 11,643,674 pounds of
structural steel. It is a cable stayed bridge, not a suspension bridge.
The bridge cables are two different sizes. There are 44 large cables that have a diameter of 6.3 inches and
are made up of 31 individual strands of wire. The 14 smaller cables have a diameter of 4.9 inches and are
made up of 12 individual strands of wire.
You may use a calculator for all computation, but show all formula steps as usual.
1.
What is the circumference of each of the large cables?
2.
What is the area of a cross-section of one of the large cables?
3.
What is the circumference of each of the smaller cables?
4.
What is the area of a cross-section of one of the smaller cables?
Assuming the strands of wire inside the cables take up 90% of the area, what is your best guess
5.
at the diameter and circumference of a single strand of wire inside the larger cable?
6.
How does the circumference of a circle change if you double the length of its radius?
7.
How does the circumference of a circle change if you double the length of its diameter?
8.
If you triple the length of the radius of a circle, how does its circumference change?
9.
If you make the circumference of a circle half as long, how does its diameter change?
10. If you multiply the radius of a circle by y , how does its diameter change?
A circular swimming pool has a border of 30 curved tiles. There are blue and white tiles in a
11.
pattern of two blue tiles between every white tile. How many white tiles are there?
th
Created by Lance Mangham, 6
grade math, Carroll ISD
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