2.3 Biconditionals
Presentation
•
Mathematics
•
10th Grade
•
Practice Problem
•
Hard
+2
Standards-aligned
Kimberly Brightmore
Used 48+ times
FREE Resource
6 Slides • 10 Questions
1
2.3 Biconditionals
Geometry CP
2
Biconditional Review
A statement that contains the phrase "if and only if."
"if and only if" is abbreviated using iff
3
To determine if a statement is a true biconditional, both the conditional and converse must be true!
Conditional: If the shape has 3 sides, then it is a triangle.
Converse: If it is a triangle, then the shape has 3 sides.
Conditional is TRUE, Converse is TRUE, so Biconditional is TRUE.
4
To determine if a statement is a true biconditional, both the conditional and converse must be true!
Conditional: If it is a square, then the shape has 4 sides.
Converse: If the shape has 4 sides, then it is a square.
Conditional is TRUE, Converse is FALSE, so Biconditional is FALSE.
5
Multiple Choice
What is the conditional statement from the following biconditional:
Two angles are supplementary if and only if the sum of their measures is 180°.
If the sum of their measures is 180º, then two angles are supplementary.
If two angles are supplementary, then the sum of their measures is 180º.
6
Multiple Choice
What is the converse statement from the following biconditional:
Two angles are supplementary if and only if the sum of their measures is 180°.
If the sum of their measures is 180º, then two angles are supplementary.
If two angles are supplementary, then the sum of their measures is 180º.
7
Multiple Choice
What is the conditional statement from the following biconditional:
Three points are collinear iff all three points lie on the same line.
If three points are collinear, then all three points lie on the same line.
If all three points lie on the same line, then three points are collinear.
8
Multiple Choice
What is the converse statement from the following biconditional:
Three points are collinear iff all three points lie on the same line.
If three points are collinear, then all three points lie on the same line.
If all three points lie on the same line, then three points are collinear.
9
Fill in the Blanks
Write the conditional of the following biconditional statement:
An animal is a dog iff it has fur.
Type answer...
10
Fill in the Blanks
Write the converse of the following biconditional statement:
An animal is a dog iff it has fur.
Type answer...
11
How to write a conditional as a biconditional
If two segments are the same size, then they are congruent.
Cross out the IF and the THEN.
Rewrite the statement using IFF in the spot where the "then" used to be.
Two segments are the same size iff they are congruent.
12
Fill in the Blanks
Write the biconditional of:
If today is Friday, then tomorrow is Saturday.
Type answer...
13
Fill in the Blanks
Write the biconditional of:
If this month is September, then last month was August.
Type answer...
14
TRUE vs. FALSE Biconditionals
If ...
the conditional statement is true
the converse statement is true
then the biconditional is true.
15
Multiple Choice
Is the biconditional true or false?
Biconditional: It is Saturday iff I do not have school.
Conditional: If it is Saturday, then I do not have school.
Converse: If I do not have school, then it is Saturday.
True
False
16
Multiple Choice
Is the biconditional true or false?
Biconditional: Three points are coplanar if and only if they lie in the same plane.
Conditional: If three points are coplanar, then they lie in the same plane.
Converse: If they lie in the same plane, the three points are coplanar.
True
False
2.3 Biconditionals
Geometry CP
Show answer
Auto Play
Slide 1 / 16
SLIDE
Similar Resources on Wayground
15 questions
Lesson 11: Matrix Operations
Presentation
•
10th Grade
15 questions
Factoring the GCF
Presentation
•
10th Grade
14 questions
4.2.4 Application with Trigonometry
Presentation
•
9th - 10th Grade
12 questions
Points, Lines, and Planes
Presentation
•
10th Grade
12 questions
Lesson 4: Relations and Functions
Presentation
•
10th Grade
13 questions
Circumference and Area of Circles (Review)
Presentation
•
10th Grade
12 questions
Quadratic Applications Warmup
Presentation
•
9th - 10th Grade
10 questions
Triangle Congruence
Presentation
•
10th - 11th 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
10 questions
Exploring the Basics of Exponents
Interactive video
•
6th - 10th Grade
20 questions
Unit 5 Test RSC (25-26)
Quiz
•
10th Grade
12 questions
Identify Rigid Transformations
Quiz
•
8th - 12th Grade
10 questions
Complementary, Supplementary, Vertical, and Linear Pairs
Quiz
•
9th - 12th Grade
10 questions
Solving Two-Step Equations with Negatives
Interactive video
•
6th - 10th Grade
22 questions
Identify Vertical and Horizontal Translations
Quiz
•
9th - 12th Grade
10 questions
Exploring Equivalent Ratios and Ratio Tables
Interactive video
•
6th - 10th Grade
10 questions
Graphing Inequalities on a Number Line
Quiz
•
9th - 12th Grade