4.4 Triangle Angle-Sum Theorem
Presentation
•
Mathematics
•
8th Grade
•
Practice Problem
•
Easy
Standards-aligned
Nicole Nuwer
Used 3+ times
FREE Resource
7 Slides • 12 Questions
1
Theorem- a general proposition not self-evident but proved by a chain of reasoning; a truth established by means of accepted truths.
2
Match
Match the following
add up to 180 degrees
add up to 90 degrees
are congruent to each other
have a common side and a common vertex (corner point), and don't overlap.
Supplementary Angles
Complementary Angle
Vertical Angles
Adjacent Angles
Supplementary Angles
Complementary Angle
Vertical Angles
Adjacent Angles
3
Match
Match the following
Three equal sides Three equal angles, always 60°
Two equal sides Two equal angles
No equal sides No equal angles
All angles are less than 90°
Has an angle more than 90°
Equilateral Triangle
Isosceles Triangles
Scalene Triangles
Acute Triangles
Obtuse Triangles
Equilateral Triangle
Isosceles Triangles
Scalene Triangles
Acute Triangles
Obtuse Triangles
4
5
6
Multiple Choice
According to the Triangle Angle-Sum Theorem, what is the sum of the interior angles of a triangle?
180 degrees
90 degrees
360 degrees
270 degrees
7
8
Dropdown
9
10
11
Math Response
A triangle has interior angle measures of
39°, 53°, and x. What is the value of x?
12
Math Response
What is the measure of the missing angle?
13
Math Response
What is the value of p?
14
Math Response
What is the value of a?
15
16
Multiple Choice
Can you have a triangle with the following angles?
20°, 130°, 40°
Yes, they equal 180°
No, they equal 190°
No, they equal 180°
Yes, they equal 190°
17
Multiple Choice
Can you have a triangle with the following angles?
120°, 30°, 30°
Yes, they equal 180°
No, they equal 170°
No, they equal 180°
Yes, they equal 170°
18
Multiple Choice
Can you have a triangle with the following angles?
1°, 90°, 90°
Yes, they equal 180°
No, they equal 181°
No, they equal 180°
Yes, they equal 181°
19
Multiple Choice
Can you have a triangle with the following angles?
15°, 160°, 5°
Yes, they equal 180°
No, they equal 80°
No, they equal 180°
Yes, they equal 80°
Theorem- a general proposition not self-evident but proved by a chain of reasoning; a truth established by means of accepted truths.
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