Week 5 Warm Up 02.01.12 Add theorem 2.1 here next year.

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Presentation transcript:

Week 5 Warm Up 02.01.12 Add theorem 2.1 here next year.

Find the scale factor of Re 1 Find the scale factor of Δ NQP to Δ TQR scale factor =

I will identify similar Triangles. Angle – Angle (AA) Similarity Section 8.4 Day 1 I will identify similar Triangles. Postulate 25 Angle – Angle (AA) Similarity If two angles of one triangle are congruent to two angles of another triangle, then the two triangles are congruent.

Ex 1 c. b. ∠B ≅ ∠TEC 79 ⁰ ≅ ∠TEC BE = BT - ET BE = 20 - 5 BE = 15

Ex 2 Find the value of x. = 3( 17 ) = 4( 17 - x ) 51 = 68 - 4x -17 = -4x 4.24 = x

Ex 3 Don’t Write rise run

Can the triangles be proven similar? Ex 4 m∠B = m∠E m∠D = 47⁰ m∠C = 31⁰ m∠D ≠ m∠A m∠C ≠ m∠F Not similar – at least two angles must be congruent.

Do 1: Assignment: Handout - 8.4B