What is the Triangle Sum Theorem?
Triangle Sum, Classifying Triangles, & Congruent Triangles

Flashcard
•
Mathematics
•
9th - 11th Grade
•
Hard
Quizizz Content
FREE Resource
Student preview

15 questions
Show all answers
1.
FLASHCARD QUESTION
Front
Back
The Triangle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.
2.
FLASHCARD QUESTION
Front
How do you classify triangles based on their sides?
Back
Triangles can be classified as Equilateral (all sides equal), Isosceles (two sides equal), or Scalene (no sides equal).
3.
FLASHCARD QUESTION
Front
How do you classify triangles based on their angles?
Back
Triangles can be classified as Acute (all angles less than 90°), Right (one angle equal to 90°), or Obtuse (one angle greater than 90°).
4.
FLASHCARD QUESTION
Front
What is a congruent triangle?
Back
Congruent triangles are triangles that are identical in shape and size, meaning their corresponding sides and angles are equal.
5.
FLASHCARD QUESTION
Front
What is the symbol for congruence?
Back
The symbol for congruence is '≅'.
6.
FLASHCARD QUESTION
Front
If two angles are complementary, what is the sum of their measures?
Back
The sum of the measures of two complementary angles is 90 degrees.
7.
FLASHCARD QUESTION
Front
What is the definition of an obtuse triangle?
Back
An obtuse triangle is a triangle that has one angle greater than 90 degrees.
Create a free account and access millions of resources
Similar Resources on Quizizz
15 questions
Congruent Triangles

Flashcard
•
9th - 11th Grade
14 questions
Congruent Triangles

Flashcard
•
9th - 10th Grade
15 questions
Congruent Triangles

Flashcard
•
9th - 11th Grade
14 questions
Congruent Triangles

Flashcard
•
9th - 10th Grade
15 questions
Unit 5 Triangles, Triangles, Triangles!

Flashcard
•
9th - 11th Grade
15 questions
Congruent Triangles

Flashcard
•
9th - 11th Grade
15 questions
Unit 5 Triangles, Triangles, Triangles!

Flashcard
•
9th - 11th Grade
15 questions
Congruent Triangles

Flashcard
•
9th - 11th Grade
Popular Resources on Quizizz
15 questions
Multiplication Facts

Quiz
•
4th Grade
25 questions
SS Combined Advisory Quiz

Quiz
•
6th - 8th Grade
40 questions
Week 4 Student In Class Practice Set

Quiz
•
9th - 12th Grade
40 questions
SOL: ILE DNA Tech, Gen, Evol 2025

Quiz
•
9th - 12th Grade
20 questions
NC Universities (R2H)

Quiz
•
9th - 12th Grade
15 questions
June Review Quiz

Quiz
•
Professional Development
20 questions
Congruent and Similar Triangles

Quiz
•
8th Grade
25 questions
Triangle Inequalities

Quiz
•
10th - 12th Grade
Discover more resources for Mathematics
40 questions
Week 4 Student In Class Practice Set

Quiz
•
9th - 12th Grade
25 questions
Triangle Inequalities

Quiz
•
10th - 12th Grade
10 questions
Right Triangles: Pythagorean Theorem and Trig

Quiz
•
11th Grade
10 questions
Exponential Growth and Decay Word Problems

Quiz
•
9th Grade
45 questions
Week 3.5 Review: Set 1

Quiz
•
9th - 12th Grade
17 questions
High School Survival Guide

Lesson
•
9th - 12th Grade
15 questions
Factoring Quadratics

Quiz
•
9th Grade