Download Chapter 4: Congruent Triangles

Chapter 4: Congruent
Triangles
Lesson 1: Classifying Triangles
Classifying Triangle by Angles
 Acute Triangle: all of the angles are acute
 Obtuse Triangle: one angle is obtuse, the
other two are acute
 Right Triangle: one angle is right, the other
two are acute
 Equiangular Triangle: all the angles are 60
degrees
Classifying Triangles by Sides
 Scalene Triangle: all sides are
7
different measures
3
5
 Isosceles Triangle: at least two sides
* vertex angle= formed by the two
sides of an isosceles
have the same measure congruent
triangle
* base= the side of an isosceles
triangle not congruent to the others
 Equilateral Triangle: all sides have
the same measure
If point Y is the midpoint of VX,
and WY = 3.0 units, classify
ΔVWY as equilateral, isosceles,
or scalene. Explain your
reasoning.
ALGEBRA Find the measure of the
sides __
of isosceles triangle KLM
with base KL.
ALGEBRA Find x and the measure of each side of
equilateral triangle ABC if AB = 6x – 8, BC = 7 + x,
and AC = 13 – x.
 Find the measure of each side of
Triangle JKL and classify the triangle
based on its sides.
 J(-3, 2) K(2, 1) L(-2, -3)
Find
y___
___