Triangles

Triangles can be classified by what two things?

• Side length

• Number of Vertices

• Angles

• Congruent Sides

A triangle with 3 congruent sides is called a(n) ______

• Isosceles Triangle

• Equilateral Triangle

• Obtuse Triangle

• Irregular Triangle

A scalene triangle has _____

• 3 different angle names

• no congruent sides

• all sides congruent

• 3 congruent angles

Figure formed by three segments joining three noncollinear (not on the same line) points is called a ___________

• Parallel line

• Triangle

• Trapezoid

• Plane

In an isosceles triangle, the congruent sides are known as the _______

• hypotenuse

• legs

• base

• right angles

An equilateral triangle has at least ____ congruent angles

• 4

• 3

• 2

• 0

A triangle with at least one angle greater than 90 degrees is a(n) ________ triangle

• obtuse

• left

• right

• acute

How many acute angles must an acute triangle have?

• 2
• 1
• 4
• 3

What type of triangle is this?

• scalene
• acute
• equilateral
• isosceles

• A
• B
• C
• D