

2/3/21 Geo
Presentation
•
Mathematics
•
9th - 12th Grade
•
Hard
Susan Johnson
Used 2+ times
FREE Resource
8 Slides • 22 Questions
1
2/3 Geo Classifying Triangles
Take notes on the slides and videos. You will be uploading your notes for credit.
2
Classifying Triangles by angle measure
Acute Triangle: 3 acute angles
Equiangular Triangle: 3 congruent acute angles
Right Triangle: 1 right angle
Obtuse Triangle: 1 obtuse angle
3
Classifying Triangles by side length
Isosceles Triangle: At least 2 congruent sides
Equilateral Triangle: 3 congruent sides
Scalene Triangle: No congruent sides
4
Use the definitions from slides 3 and 4 to match the names to the triangle pictures. Note: Some triangles can be classified in more than one way.
A: Acute Triangle
B: Equiangular Triangle
C: Right Triangle
D: Obtuse Triangle
E: Isosceles Triangle
F: Equilateral Triangle
G: Scalene Triangle
5
6
Fill in the Blanks
Classify the triangle shown by its sides.
Type answer...
7
Fill in the Blanks
Classify the triangle shown by its angles
Type answer...
8
Fill in the Blanks
Classify the triangle shown by its sides.
Type answer...
9
Fill in the Blanks
Classify the triangle shown by its angles
Type answer...
10
Fill in the Blanks
Classify the triangle shown by its sides.
Type answer...
11
Fill in the Blanks
Classify the triangle shown by its sides.
Type answer...
12
Fill in the Blanks
Classify the triangle shown by its angles
Type answer...
13
Fill in the Blanks
Classify the triangle shown by its sides.
Type answer...
14
Fill in the Blanks
Classify the triangle shown by its angles
Type answer...
15
Fill in the Blanks
Classify the triangle shown by its sides.
Type answer...
16
Fill in the Blanks
Classify the triangle shown by its angles
Type answer...
17
Fill in the Blanks
Classify the triangle shown by its angles
Type answer...
18
Fill in the Blanks
Classify the triangle shown by its sides.
Type answer...
19
Fill in the Blanks
Classify the triangle shown by its angles
Type answer...
20
Triangle Sum Theorem: The sum of the angles of any triangle will always be 180o.
Name and classify the 3 triangles to the right. Justify your answers.
21
22
Fill in the Blanks
Find x
Type answer...
23
Fill in the Blanks
Find DE
Type answer...
24
Fill in the Blanks
Find DF
Type answer...
25
Fill in the Blanks
Find EF
Type answer...
26
Fill in the Blanks
Find X
Type answer...
27
Fill in the Blanks
Find AC
Type answer...
28
Fill in the Blanks
Find AB
Type answer...
29
Fill in the Blanks
Find BC
Type answer...
30
Answers for the problems in the notes
1: C, E / 2: A, E / 3: B, F
4: B, F / 5: D, G / 6: D, E / 7: C, G
ΔEFH obtuse scalene
ΔEHG right scalene
ΔHFG equiangular, equilateral, and technically acute
2/3 Geo Classifying Triangles
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