Upload
raymond-sharp
View
220
Download
1
Tags:
Embed Size (px)
Citation preview
• The angles of a pentagon are in ratio 4:2:5:5:2, find the measure of each angle
4x+2x+5x+5x+2x = 540 18x = 540 x = 30 120, 60, 150, 150, 60
• Find the third term of a proportion if 4, 9, and 15 are the first, second and fourth term respectively.
Properties of Proportions:
• If , then:a) ad = bc (Means-Extremes Theorem)b) ( Interchanging property)c) (Flipping property)d) (Denominator adding property)
Definition: Similar Polygons
• Two polygons are similar iff,
1) Corresponding angles are congruent2) Corresponding sides are in proportion
AA~ theorem
• If two angles of one triangle are congruent to corresponding angles of another triangle, then the triangles are similar.