Measurements Flashcards
1
Q
Find third side of triangle
a=4
b= 6
A
a2 + b2 = c2
16sf + 36sf = 52sf
Root 52 = 7.21
2
Q
Area of trapezoid
A
a + b / 2 x h
3
Q
Circumference of a circle
A
C = pie x diameter
Or
C = 2 pie x radius
4
Q
Area of circle
A
A=pie d^2 / 4
A=pie r^2
5
Q
Acre
A
4840 sq yds
43,560 sq ft
6
Q
1 sq yd
A
9 sq ft
7
Q
1 yd
A
3 ft = 36 in
8
Q
Convert inches into feet
A
1” = 1/12 = .083’ 2” = 2/12 = .167’ 3” = 3/12 = .250
9
Q
How much pressure loss per foot
A
.433 psi
10
Q
Water pressure at one point 42.4, what will pressure be 20’ higher
A
20 x .433 = 8.66
42.4 - 8.66 = 33.74 psi
11
Q
Scale on drawing is 1/4” : 1’
2-5/8” long equals?
A
2*8 + 5/ 8” / 1/4”
21/8 x 4
84/8
10.5’
