Classify triangles by sides and by angles

1
EXAMPLE 1
Classify triangles by sides and by angles
SOLUTION
The triangle has a pair of congruent sides, so it
is isosceles. By measuring, the angles are 55 ,
55 , and 70 . It is an acute isosceles
triangle.
2
EXAMPLE 2
Classify a triangle in a coordinate plane
SOLUTION
3
EXAMPLE 2
Classify a triangle in a coordinate plane
4
for Examples 1 and 2
GUIDED PRACTICE
5
for Examples 1 and 2
GUIDED PRACTICE