The document defines and provides examples of different types of triangles: scalene triangles have no congruent sides; isosceles triangles have at least two congruent sides; equilateral triangles have three congruent sides; equiangular triangles have three congruent angles. It also defines acute, obtuse, right triangles based on angle measures, and labels the hypotenuse and legs of a right triangle. The homework assignments are problems 3, 7, 9, and 10 on page 145 due Monday.

1. Geom3­6Student.notebook October 18, 2011
3.6 ­ Types of Triangles
scalene triangle ­ a triangle in which NO two sides are congruent
isosceles triangle ­ a triangle in which AT LEAST TWO sides are
congruent
equilateral triangle ­ a triangle in which ALL sides are congruent
equiangular triangle ­ a triangle in which ALL angles are
congruent
(label the triangle to fit the definition)
acute triangle ­ a triangle in which ALL angles are acute
60 This is just one example.
50
70
obtuse triangle ­ a triangle in which ONE of the angles is an
obtuse angle
angle measure greater than 90
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2. Geom3­6Student.notebook October 18, 2011
right triangle ­ a triangle in which ONE angle is a right angle
hypotenuse ­ the side opposite the right angle in a right triangle
legs ­ sides that form the right angle in a right triangle
hy
po
ten
us
e
leg
leg
Please read through the sample problems on p. 144.
HOMEWORK: p.145 #3,7,9,10
Due Monday
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