1 / 10

Triangle Classification and Angle Measures

Learn to classify triangles & find angles, use exterior triangle angles, Triangle Angle-Sum Theorem, and more! Example problems included.

quinlan-carver
Download Presentation

Triangle Classification and Angle Measures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 3-3 Parallel Lines & the Triangle Angle Sum TheoremM11.B.2 2.4.11.B Objectives: To classify triangles and find the measures of their angles. To use exterior angles of triangles.

  2. Triangle Angle-Sum • The sum of the measures of the angles of a triangle is 180. m<A + m<B + m<C = 180 C A B

  3. Example: Find the missing value • Find m<Z Z 67° 48° X Y

  4. Example: Find the missing value • Triangle ABC, <ACB is a right angle, and CD AB. Find the values of a, b, and c(Textbook page 133 - TE) T

  5. Ex: Find the value of x, y, and z.(textbook page 132) G F J H

  6. Classify Triangles: by Angles • Equiangular • Acute • Right • Obtuse

  7. Classify Triangles: by Sides • Equilateral • Isosceles • Scalene

  8. Ex: Classify a Triangleby its Angles & Sides 5 4 2

  9. Vocab • An exterior angle of a polygon, is an angle formed by a side and an extension of an adjacent side. • For each exterior angle of a triangle, the two nonadjacent interior angles are its remote interior angles. Triangle Exterior Angle Theorem. m<1= m<2 + m<3

  10. Example: Using the Exterior Angle Theorem

More Related