Download Activity 5.5

Activity 5.5
1. Use a ruler to measure each of the three sides of the triangle in centimeters. Mark the measures on
the sides of the triangles.
2. Use a protractor to measure each of the three angles of the triangle, rounding to the nearest
degree. Mark the measures on the angles of the triangles.
3. In each triangle determine which side has the longest length, the shortest length, and the middle
length. Put the name of the side (not its measure) in the blank.
4. In each triangle determine which side has the largest measure, the smallest measure, and the
medium measure. Put the name of the angle (not its measure) in the blank.
5. Using your findings, answer the two questions.
a. A
b.
A
C
C
B
shortest side is _____
middle side is _____
longest side is _____
smallest angle is _____
medium angle is _____
largest angle is _____
B
shortest side is _____
middle side is _____
longest side is _____
smallest angle is _____
medium angle is _____
largest angle is _____
In general the smallest angle is across from ______.
A. the smallest side
B. the middle side
C. the longest side
In general the longest side is across from _____.
A. the smallest angle
B. the medium angle
C. the largest angle
In geometry, we call these generalizations the Order theorems for Triangles.