Download Classifying Triangles

Classifying Triangles
Classifying by Angles:
Acute - 3 acute angles
Obtuse - 1 obtuse angle
Right - 1 right angle
Equiangular – An acute triangle with 3
congruent angles
Classifying Triangles
Classifying by Sides:
Scalene - No sides congruent.
Isosceles - At least 2 sides
congruent.
Equilateral - All sides congruent.
ARCHITECTURE The frame of this window design is
made up of many triangles. Classify ABC, ACD, and
ADE as acute, equiangular, obtuse, or right.
Answer: ABC is acute.
ACD is obtuse.
ADE is right.
Identify the indicated triangles in the figure.
a. isosceles triangles
Answer: ADE, ABE
b. scalene triangles
Answer: ABC, EBC, DEB, DCE, ADC, ABD
ALGEBRA Find d and the measure of each side of
equilateral triangle
if
and
Answer:
Find the measures of the sides of ABC. Classify the
triangle by sides.
Answer:
; since all 3 sides
have different lengths, ABC is scalene.