Triangle Inequality Theorem and Triangle Sum

Presentation

•

Mathematics

•

6th Grade

•

Hard

James Gonzalez

FREE Resource

8 Slides • 7 Questions

Triangle Sum and Inequality Therom

Sum of Angles in a Triangle

A triangle has 3 angles that ADD together to equal 180 degrees.
If you are given angles and they DO NOT ADD UP TO 180 degrees, then you CAN NOT make a Triangle.

Multiple Choice

The Sum of Angles in a Triangle Theorem states that the angles in a triangle ADD up to what degree?

90 Degrees

180 Degrees

270 Degrees

360 Degrees

Multiple Choice

Which Angle measurements create a Triangle?

100

Multiple Choice

Which Angle measurements does NOT create a Triangle?

100

Find Missing Angle

Step 1: Write as a SUM of 180

Step 2: Plug In and SOLVE

Ex: a + b + c = 180

a = 120

b = 34

120 + 34 + c = 180

154 + c = 180

c = 26 Degrees

Multiple Choice

Find the missing angle measure of Angle T.

71 Degrees

105 Degrees

109 Degrees

82 Degrees

Multiple Choice

Find the measure of the indicated angle.

Angles and Sides

The smallest angle will be opposite the shortest side
While the largest angle will be opposite the longest side.
A side is congruent to another side if it has an equal length.

Triangle Inequality

To form a triangle, the sum of any two side lengths MUST be GREATER THAN the last side length.

a + b > c

b + c > a

a + c > b

Multiple Choice

Can the following side measures form a triangle?
4 cm, 7 cm, 10 cm

Yes

Multiple Choice

Can the following side measures form a triangle?
3 ft, 5 ft, 8 ft

Yes

Triangle Sum and Inequality Therom

Show answer

Auto Play

Slide 1 / 15

SLIDE

Similar Resources on Wayground

11 questions

Area of Triangle Parallelogram Trapezoid

Presentation

•

6th Grade

14 questions

Angle Relationships- Vertical, Complementary, Supplementary

Presentation

•

7th Grade

11 questions

Proportional Scale Drawings

Presentation

•

7th Grade

12 questions

Scale Factors and Scale Drawings

Presentation

•

7th Grade

12 questions

Unit 11: Angles + Triangles - Lesson 1

Presentation

•

6th Grade

10 questions

Angles of Convex Polygons

Presentation

•

6th Grade

10 questions

Problem Solving with Area of Triangles

Presentation

•

6th Grade

11 questions

Multiplying Fractions

Presentation

•

6th Grade

Popular Resources on Wayground

10 questions

Safety Day 2026 – Student Review

Quiz

•

9th Grade

21 questions

Continents and Oceans

Quiz

•

6th Grade

20 questions

Parts of Speech

Quiz

•

5th Grade

16 questions

Subject & Predicate

Quiz

•

5th Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

12 questions

Map Skills

Quiz

•

3rd Grade

22 questions

Continents and Oceans

Quiz

•

5th Grade

15 questions

Rounding Decimals

Quiz

•

5th Grade

Discover more resources for Mathematics

20 questions

Add and Subtract Integers

Quiz

•

6th - 8th Grade

14 questions

Explore Integers and Rational Numbers

Quiz

•

6th Grade

22 questions

Ratios and Ratio Tables

Quiz

•

6th Grade

12 questions

Calculate with Positive Rational Numbers

Quiz

•

6th Grade

15 questions

Adding and Subtracting Integers

Quiz

•

6th - 8th Grade

70 questions

Multiplication Facts

Quiz

•

3rd - 6th Grade

16 questions

Exponents and Powers

Quiz

•

6th Grade

20 questions

Multiplication Facts

Quiz

•

6th Grade