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6.4.1 Prove triangles similar by AA

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Remember that Angles define a ratio, there for the sides are dependent on the angles And, remember that given 2 angles of two triangles are congruent then the third angles are also congruent (third angles theorem) Therefore…..

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Given two triangles with two pairs of congruent angles then the triangles are similar For ABC, DEF, given A D and B Fthen ABC ~ DEF B A E CF D

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If possible solve for x, justify by showing ABC ~ ADE B A E C D x x 16x 2

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We will see a better way to solve this problem in later chapters. A 6 foot persons shadow casts 2.5 feet, a telephone pole casts a shadow 50 feet long in the same sun, what is the height of the telephone pole Errors in measurement?

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p. 384 1 – 7 odd, 9, 13, 15, 20, 21, 26, 27, 32

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Solve for x and y: 43° 75° y° x° 75° = y + 43° 75 – 43 = y 32° = y z° x and 43° are Alternate Interior Angles 43° = x.

Solve for x and y: 43° 75° y° x° 75° = y + 43° 75 – 43 = y 32° = y z° x and 43° are Alternate Interior Angles 43° = x.

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