1. ÐC is the smallest angle
In triangles, each angle and its corresponding opposite side are related. In each triangle the largest angle is across from the longest side; the smallest angle is across from the shortest side. Additionally, if sides are the same length, then the opposite angles have the same measure.
7 in
5 in
3 in A B C
Example 1
ÐB is the largest angle
ÐC is the smallest angle
mÐA is in between mÐB and mÐC

2. The length of BC is between the lengths of AB and AC.
Example 2
GSP A
60°
100°
20° C B
AC is the longest side.
AB is the shortest side.
The length of BC is between the lengths of AB and AC.

3. This triangle is Equilateral and Equiangular.Y
Example 3
ÐY is the largest angle
5 in
5 in
ÐX and ÐZ are the same measure. They are both less than mÐY. X
7 in Z J
Example 4
7 in
7 in
This triangle is Equilateral and Equiangular.
7 in L K
ÐJ, ÐK, and ÐL are all the same measure.

4. The length of FE is in between the lengths of the other two sides.
DE is the longest side
DF is the shortest side D
The length of FE is in between the lengths of the other two sides.
70°
Example 5
90°
20° E F G
JH is the longest side
80°
GJ and GH have the same length. The length is less than the length of JH.
Example 6
50°
50° J H