Warm Up 01.30.12 Week 5. Section 8.3 Day 1 I will identify similar polygons. Similar Polygons Ex 1 Corresponding angles are congruent and the lengths.

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Presentation transcript:

Warm Up Week 5

Section 8.3 Day 1 I will identify similar polygons. Similar Polygons Ex 1 Corresponding angles are congruent and the lengths of corresponding sides are proportional. Statement of Proportionality

Ex 2 ∼ Symbol for Similar Similarity Statement

Polygons - Ratios If two polygons are similar, then the ratio of their perimeters is equal to the ratios of their corresponding side lengths. Theorem 8.1 K L MN P R Q S ==== KLMN ∼ PQRS IfThen, perimeterssides

JKLM ∼ QPRS. Find the value of z. Ex 3 = 15z = 6( 10 ) 15z = 60 z = 4

Scale Factor The ratio of the lengths of the corresponding sides. Scale factor of the pool to the patio is: 48ft : 32ft Scale factor = 3 : 2

Ex 4 Statement of Proportionality TUVW ∼ ABCD Scale Factor5 : 3 Length of TW m ∠TUV 30 = 3x 10 = x

Textbook page 461, Evens and 45 – 50 all. Assignment: Do: Find the value of x.