Properties of Triangles

1
Properties of Triangles

• Unit 14
• Pages 382-385 in your book

2
Polygons

• Polygon
• A closed figure formed by three or more line
  segments
• No curved lines
• No crossed lines
• Closed

3
Acute Triangle

• A triangle with all three angles less than 90

4
Right Triangle

• A triangle with one angle exactly 90

5
Hypotenuse

• The side opposite the right angle in a right
  triangle

6
Obtuse Triangle

• A triangle with one angle larger than 90

7
Scalene Triangle

• A triangle with all sides different lengths and
  all angles different measures

8
Isosceles Triangle

• A triangle with two sides the same length and two
  angles the same measure

9
Equilateral Triangle

• A triangle with all sides the same length and all
  angles the same measure

10
180

• The sum of the measures of the angles of a
  triangle

11
Practice Problems

• What kind of Triangle is this?

Isosceles and Obtuse!
12
What is the missing angle?
42
47
13
What kind of triangle is this?
10
10
10
Equilateral!