Brett Solberg AHS ‘11-’12. 1)What does CPCTC mean? Explain it in your own words. Unscramble the letters to reveal a type of triangle. 2)seicslose 3)telqariulae.

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Presentation transcript:

Brett Solberg AHS ‘11-’12

1)What does CPCTC mean? Explain it in your own words. Unscramble the letters to reveal a type of triangle. 2)seicslose 3)telqariulae 4) giaqunearul Do you want to review any HW problems?

 A triangle where exactly 2 sides are congruent.  Legs – the 2 congruent sides  Vertex Angle – the angle formed by the legs.  Base – Third side of the triangle.  Base Angles – 2 angles adjacent to the base.

 Identify the legs, base, base angles, and vertex of the triangle.  Legs –  Base –  Base Angles –  Vertex –

 Identify the legs, base, base angles, and vertex of the triangle.  Legs –  Base –  Base Angles –  Vertex –

 Identify the legs, base, base angles, and vertex of the triangle.  Legs –  Base –  Base Angles –  Vertex –

 If two sides of a triangle are congruent, then the angles opposite them are congruent.  If AB ≅ AC, then ∠B ≅ ∠C

 If two angles of a triangle are congruent, then the sides opposite them are congruent.  If ∠B ≅ ∠C then AB ≅ AC

 Solve for y.

 Solve for x.

 Solver for x.

 Bisector  Perpendicular Bisector A B

 The bisector of the vertex angle is the perpendicular bisector of the base.

 Base Angles Theorem  Converse

 If a triangle is equilateral, then it is equiangular.

 If a triangle is equiangular, than it is equilateral.

 What is the measure of the angles of any equiangular triangle?  What is the measure of the angles of any equilateral triangle?

How many equilateral triangles are there in the trifoce?

 Find the value of x and y.

 If 2 sides of a triangle are congruent, than the angles opposite them are congruent.  If two angles are congruent, then the sides opposite them are congruent.

 If a triangle is equilateral, then it is equiangular.  If a triangle is equiangular, then it is equilateral.  The angles in any equilateral or equiangular triangle are 60°.

 4.5 Worksheet and pg 230#1-13