1 / 12

Classifying Triangles & Angles of Triangles

Classifying Triangles & Angles of Triangles. Sections 4-1 & 4-2. A triangle is the figure formed by 3 segments joining 3 noncollinear points. Each of the 3 points is a vertex . The segments are the sides. A. B. C. Classifying Triangles by Sides. Scalene Triangle –

peggybrown
Download Presentation

Classifying Triangles & Angles of Triangles

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. Classifying Triangles & Angles of Triangles Sections 4-1 & 4-2

  2. A triangle is the figure formed by 3 segments joining 3 noncollinear points. Each of the 3 points is a vertex. The segments are the sides. A B C

  3. Classifying Triangles by Sides Scalene Triangle – no sides congruent Isosceles Triangle– At least 2 sides congruent Equilateral Triangle – All sides congruent

  4. Classifying Triangles by Angles 700 500 600 Acute – 3 acute angles Right – 1 right angle 400 Obtuse – one obtuse angle 200 1200 600 Equiangular – all angles congruent 600 600

  5. Parts of an Isosceles Triangle vertex angle leg leg base base angles

  6. Angle Sum Theorem • The sum of the measures of the angles of a triangle is 180. 1000 400 400

  7. Third Angle Theorem • If 2 angles of one triangle are congruent to 2 angles of another triangle, then the third angles are congruent.

  8. Corollariesstatements that can be easily proved using a theorem • Each angle of an equiangular triangle has measure 60. • In a triangle, there can be at most one right angle or obtuse angle. • The acute angles of a right triangle are complementary.

  9. Exterior Angle Theorem • The measure of an exterior angle of a triangle equals the sum of the measures of the 2 remote interior angles. Remote interior angles 350 Exterior 750 400

  10. Joke Time • What has wings and solves number problems? • A mothematician

  11. What did one math book say to the other math book? • Don’t bother me! I’ve got my own problems!

  12. What would a math student say to a fat parrot? • Poly-no-mial

More Related