4.4 Prove ∆s ≅ by SSS Mrs. vazquez Geometry.

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Presentation transcript:

4.4 Prove ∆s ≅ by SSS Mrs. vazquez Geometry

g.co.8, g.co.10, g.co12 Essential Question: How can I determine if two ∆s are ≅ given their side measurements? Objective: Students will be able to use side lengths to prove ∆s are ≅.

Side-Side-side (SSS) ≅ Postulate If three sides of one ∆ are ≅ to three sides of a second ∆, then the two ∆s are ≅.

∆JKL has vertices J(-3,-2), K(0,-2), and L(-3,-8) ∆JKL has vertices J(-3,-2), K(0,-2), and L(-3,-8). ∆RST has vertices R(10,0), S(10,-3), and T(4,0). Graph the ∆s in that same coordinate plane & show that they are ≅.

Prove ∆EAB ≅ ∆ECD Given: AE≅CE, AB≅CD, E is the midpoint of BD A C B E D