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Lesson (6.5) Parts of Similar Triangles BC A D Altitude BC A N Median Angle bisector BC A M

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E F D X Y Z B C A M L N If then The perimeter of the triangle is the sum of the measures of its sides

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Angle bisector Theorem BC A D If AD is an angles bisector then

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Check for understanding Find the perimeter of the given triangle Step1: Set up proportions. Step3: Cross multiply and solve for x. 5 Step2: substitute the values.

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Check for understanding Find x Step1: Set up proportions. Step2: Cross multiply and solve for x. 13 13

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Check for understanding Find x Step1: Set up proportions. Step2: Cross multiply and solve for x. 4 4

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Check for understanding Find x Step1: Use the angle bisector Theorem. Step2: Cross multiply and solve for x. 8 8

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HomeworkHomework Page 320 – 322 #s (10, 14, 18, 22, 24)

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Written Exercises page 320 Find the perimeter of the given triangle Step1: Set up proportions. Step3: Cross multiply and solve for x. Step2: substitute the values. 10)

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Written Exercises page 320 Find the perimeter of the given triangle Step1: Set up proportions. Step3: Cross multiply and solve for x. Step2: substitute the values. 14)

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Written Exercises page 320 Step1: Set up proportions. Step3: Cross multiply and solve for x. Step2: substitute the values. 18)

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Find x Step1: Set up proportions. Step2: Cross multiply and solve for x. Written Exercises page 321 22)

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Find x Step1: Use the angle bisector Theorem. Step2: Cross multiply and solve for x. Written Exercises page 321 24)

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