
Dorchester2-01-13-2025-Triangle Congruence with Proofs
Presentation
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Mathematics
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9th - 12th Grade
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Practice Problem
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Easy
+1
Standards-aligned
Antoinette Norris Woodson
Used 1+ times
FREE Resource
37 Slides • 7 Questions
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Monday, January 13, 2025
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Open Ended
Which ONE doesn't belong?
Choose ONE square.
State the letter A, B. C. or D
Then EXPLAIN why it doesn't belong using a complete sentence.
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All 3 sides of the triangle are congruent
SSS
2 sides and the included angle of the triangles are congruent
SAS
2 angles and the included side are congruent
ASA
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Two sides and a non-included angle do NOT prove congruence
SSA - NOT CONGRUENT!!
If both triangles are right triangles, you can use HL (hypotenuse-leg) congruence theorem.
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SSA
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Quick Check for Understanding!
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Open Ended
List the three congruence
statements for the image.
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Open Ended
Which postulate (if any) could be
used t show the triangles congruent?
SSS, SAS, ASA
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Open Ended
Which postulate (SAS, SSS, ASA, or none) can be used to show that the pair of triangle is congruent?
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Draw
Mark the drawing to show the third congruent part.
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Open Ended
Which postulate (SAS, SSS, ASA or none) could be used to show the triangles congruent?
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There is a llist of Postulates and Theorems in Schoology. You will need to refer to them to complete your assignment.
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Poll
How confident do you feel about today's lesson?
I'm good!
so-so
kind of got it
I'm confused!
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Begin assignment in Schoology
TYPE YOUR ANSWERS!
Use words if the symbol is not available
For example: angle YES,
<YES (less than symbol)
BE is parallel to JP
BE || JP (straight line next to ] )
<PUT is congruent to <DOG
Monday, January 13, 2025
Show answer
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