Download Lesson Thirteen Notes

GEOMETRY NOTES UNIT 1
LESSON 13: Classifying Triangles, Angles of Triangle, Isosceles and Equilateral Triangles
STATION #1 – CLASSIFICATION OF TRIANGLES BY SIDES/ANGLES
Triangle #1 – Purple, Purple, Purple
Classification by angles – Equiangular
Classification by sides – Equilateral
Angle Measures
Side Lengths
Triangle #2 – Purple, Orange, Green
Classification by angles – Right
Classification by sides – Scalene
Angle Measures
Side Lengths
Triangle #3 – Yellow, Yellow, Red
Classification by angles – Acute
Classification by sides – Isosceles
Angle Measures
Side Lengths
Triangle #4 – Pink, Yellow, Green
Classification by angles – Obtuse
Classification by sides – Scalene
Angle Measures
Side Lengths
Can you classify a triangle by its angles and sides?
Define acute, right, obtuse, equiangular, scalene, isosceles, and equilateral in terms of classifying triangle.
GEOMETRY NOTES UNIT 1
LESSON 13: Classifying Triangles, Angles of Triangle, Isosceles and Equilateral Triangles
EXAMPLES: Classify the triangles by its angles and sides. Then name the triangle by its vertices.
1.
2.
3.
A
T
D
I
C
B
A
_____________________________
Y
_____________________________
P
_____________________________
STATION #2 – EXTERIOR ANGLE RELATIONSHIPS
Triangle #1 – Purple, Pink, Orange
Exterior Angle Measure:
Adjacent Interior Angle Measure:
Non-Adjacent Interior Angle Measure:
Other Non-Adjacent Interior Angle Measure:
Triangle #2 – Red, Yellow, Green
Exterior Angle Measure:
Adjacent Interior Angle Measure:
Non-Adjacent Interior Angle Measure:
Other Non-Adjacent Interior Angle Measure:
What is the name and the relationship between the exterior and adjacent interior angles?
What is the relationship between the exterior angle and the 2 non-adjacent interior angles?
GEOMETRY NOTES UNIT 1
LESSON 13: Classifying Triangles, Angles of Triangle, Isosceles and Equilateral Triangles
EXAMPLES: Solve.
4. Find the value of x and the measures of each angle. Classify the triangle by its angles and sides.
YOU TRY:
5. Find the value of x and the measures of each angle. Classify the triangle by its angles and sides.