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Lesson (6.5) Parts of Similar Triangles BC A D Altitude BC A N Median Angle bisector BC A M
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
Angle bisector Theorem BC A D If AD is an angles bisector then
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.
Check for understanding Find x Step1: Set up proportions. Step2: Cross multiply and solve for x. 13 13
Check for understanding Find x Step1: Set up proportions. Step2: Cross multiply and solve for x. 4 4
Check for understanding Find x Step1: Use the angle bisector Theorem. Step2: Cross multiply and solve for x. 8 8
HomeworkHomework Page 320 – 322 #s (10, 14, 18, 22, 24)
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)
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)
Written Exercises page 320 Step1: Set up proportions. Step3: Cross multiply and solve for x. Step2: substitute the values. 18)
Find x Step1: Set up proportions. Step2: Cross multiply and solve for x. Written Exercises page 321 22)
Find x Step1: Use the angle bisector Theorem. Step2: Cross multiply and solve for x. Written Exercises page 321 24)
Thursday, January 17, 2013 Agenda: TISK & 2 MM Receive Graded Work Lesson 7-5 part 1 Homework: Begin 7-5 problems in HW Packet.
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Ex. 3: Why a Line Has Only One Slope Use the properties of similar triangles to explain why any two points on a line can be used to calculate slope. Find.
Two Special Right Triangles 45°- 45°- 90° 30°- 60°- 90°
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1 Similar Triangles Section Two polygons are similar if and only if their corresponding angles are congruent and the measures of their corresponding.
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7-1: Geometric Mean. Geometric Mean Given two numbers a and b, you can find the geometric mean by solving the proportion: The geometric mean of two numbers.
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117 is 45% of what number? COURSE 2 LESSON is 45% of 260. = 117 n Write the proportion. Write the cross products. 45n = 117(100) n = 260.
Ratios, Proportions, AND Similar Figures Todays Goal(s): 1.To write ratios and solve proportions. 2.To identify and apply similar polygons.
I think of a number. I multiply it by 5 then add 4. The result is 39. Construct an equation and find the number. I think of a number. I multiply it by.
Warm Up For Exercises 1 and 2, find the value of x. Give your answer in simplest radical form Simplify expression. 3.
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Objectives To use the side-splitter theorem. To use the triangle angle-bisector theorem.
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