ABCD ~ GBEF. Find the value of y. A B G C D F E 24 15 12 y.

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ABCD ~ GBEF. Find the value of y. A B G C D F E y

Quiz Review 1.Find the scale factor of Figure A to Figure B. 1.If triangle PQR ~ to triangle STU, then find all possible values of x. 1.Find the scale factor of Figure A to Figure B. 1.If triangle PQR ~ to triangle STU, then find all possible values of x. A 6 B 4 S T U 13 - x R P Q 7 - x

Example 2: RPlot the given points on graph paper. Draw quadrilateral ABCD and A’B’. Locate points C’ and D’ so that A’B’C’D’ is similar to ABCD. A(0, 0), B(4, 0), C(2, 4), D(0, 2), A’(-10, -2), B’(-2, -2) RPlot the given points on graph paper. Draw quadrilateral ABCD and A’B’. Locate points C’ and D’ so that A’B’C’D’ is similar to ABCD. A(0, 0), B(4, 0), C(2, 4), D(0, 2), A’(-10, -2), B’(-2, -2) C’(-6,6), D’(-10,2) C’(-6,-10), D’(-10,-6)

Determine whether each statement is always, sometimes or never RTwo congruent triangles are similar RTwo squares are similar RA triangle is similar to a quadrilateral RTwo isosceles triangles are similar RTwo rectangles are similar RTwo obtuse triangles are similar RTwo equilateral triangles are similar RTwo congruent triangles are similar RTwo squares are similar RA triangle is similar to a quadrilateral RTwo isosceles triangles are similar RTwo rectangles are similar RTwo obtuse triangles are similar RTwo equilateral triangles are similar always never sometimes

Graph the given points. Draw polygon ABCD and segment MN. Find the coordinates for vertices L and P such that ABCD~NLPM. A(2,0), B(4,4), C(0,4), D(-2,0), M(4,0), N(12,0) L(16,8) and P(8,8) or L(16,-8) and P(8,-8)

State if the polygons are similar and how similar Not similar

Write the similarity statement, and find x, the measures of the indicated sides, and the scale factor. D E C A B 6 12-x 4 x+7

Homework- pg #19-29odd, 31-40all 19.4:534. SOMETIMES , 12.5, ALWAYS 23. 4:536. NEVER 25. 2:137. ALWAYS SOMETIMES 29.NO39. 11, 9 31.SOMETIMES40. 32/3, SOMETIMES 33.SOMETIMES 19.4:534. SOMETIMES , 12.5, ALWAYS 23. 4:536. NEVER 25. 2:137. ALWAYS SOMETIMES 29.NO39. 11, 9 31.SOMETIMES40. 32/3, SOMETIMES 33.SOMETIMES

Given: ABCD ~EFGH Prove: 45.Statement Reason 1. ABCD ~ EFGH 1.Given 2. L:kl2.Def. of similar figures 3. 1:k is the scale factor3. Division Def. of similar figures Mult. 45.Statement Reason 1. ABCD ~ EFGH 1.Given 2. L:kl2.Def. of similar figures 3. 1:k is the scale factor3. Division Def. of similar figures Mult.

StatementsReasons Addition Def. of perimeter Subst Division Subst. StatementsReasons Addition Def. of perimeter Subst Division Subst.