Lesson 15 · Congruency and Similarity

Congruency and Similarity Presentation

MathematicsSubject
8 minEstimated read
Slide 1 of 4
Mathematics, Class 8

Congruency and Similarity

Same shape · Equal size · Five tests

What We Will Be Able To Do

📐

Tell congruent and similar triangles apart

🔍

Pick out corresponding angles and sides

✅

Say which of the five tests applies

🧮

Work out unknown angles and sides

Two Questions for Comparing Figures

🟰Is the shape the same?
Do the angles match?
Are they built the same way?
VS
📏Is the size the same?
Are the side lengths equal?
Do they cover each other exactly?

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Presenter notes: Today we learn when two triangles fit each other exactly and when only their shape matches.