Basic Units and Measurement
Data Sheet for Statics Lab 1
#1
Lab day and time
Sketch _____ Analysis ______ Answers ______ Neatness _______ Total _______
Group members (Each member must print name)
1. Trace and label the pentagon. (Use to check your calculations.)
2. Measure one triangle with a meter stick
Side a _______________
Triangle number
Side b ________________
Side c
3. Measure a second triangle with a yard stick
Triangle number
(Angle C = 90)
Side a _______________
Side b ________________ Side c
1 (obtuse)
4. Assignment:
Show all work including basic equations and labeled sketches where 2appropriate.
(right)
Submit the following results as a group:
a. The labeled sketch (Part 1).
b. Calculate the angles A, B, and C for triangle  by using the law of cosines and
the law of sines.
Calculate the angles A and B for triangle  by using the tangent function. Use
the law of cosines to calculate the hypotenuse (compare to c2 = a2 + b2 formula).
Compare the sum of the angles in each triangle to 180 degrees.
c. Calculate areas for each triangle in units used for measurement. Area 
1
bc sin A
2
d. Determine the ratio (Area1 / Area2) of the areas (in centimeters) of the two
triangles (requires unit conversion).
0610 - 302
Rochester Institute of Technology
Report Cover Sheet
Page 1 of
11/28/01
Revised mg 8/31/04
0610 – 302
Measurement, Trig Formulas, and Unit Conversion
Lab #1
Data Sheet for Pentagon
L1
L2
C

A
B
Y2
Y1

C
B
X2
D:\533576419.doc
Rochester Institute of Technology
Revised pjb 3/11/02