Answer:
A. The length is 3
B. angel T
C. The perimeter is 20ft
Step-by-step explanation:
They are congruent so there side leghths are the same.
Second moment of area about an axis along any diameter in the plane of the cross section (i.e. x-x, y-y) is each equal to (1/4)pi r^4.
The second moment of area about the zz-axis (along the axis of the cylinder) is the sum of the two, namely (1/2)pi r^4.
The derivation is by integration of the following:
int int y^2 dA
over the area of the cross section, and can be found in any book on mechanics of materials.
Answer:
Step-by-step explanation:
2x+3x+4x=180
8x=180
divide by 8 to both sides
x=22.5
2*5=10/3
10/3=3.33
two times 5 equals 10
1 times 3 equals 3
10 divided by 3 equals 3.33
