1 / 9

Aim:

Aim:. C. B. A. D. P. 2) Which of the following shapes are polygons ?. c). b). a). e). f). d). What are polygons? How do we classify triangles?. Do Now:. All angles and all sides of a regular polygon are equal in measure.

Jims
Télécharger la présentation

Aim:

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. Aim: C B A D P 2) Which of the following shapes are polygons? c) b) a) e) f) d) What are polygons? How do we classify triangles? Do Now: Geometry Lesson: Polygons, Triangles

  2. All angles and all sides of a regular polygon are equal in measure. A polygon is a closed figure that is the union of line segments that intersect only at their endpoints. Def: Polygons Def: Regular Polygons: Geometry Lesson: Polygons, Triangles

  3. P R Q Triangles: A triangle is a polygon with exactly three sides. Geometry Lesson: Polygons, Triangles

  4. P R Q “Included” Sides and Angles of Triangles Two angles that share a side “include” the side. Two sides “include” the angle between them. Geometry Lesson: Polygons, Triangles

  5. P R Q “Opposite” Sides and Angles of Triangles Each angle of a triangle has an opposite side, and vice versa. Geometry Lesson: Polygons, Triangles

  6. Def: An triangle has three congruent sides. Def: An triangle has at least two congruent sides. Def: A triangle has no congruent sides. Classifying Triangles by Sides: Equilateral Isosceles Scalene Geometry Lesson: Polygons, Triangles

  7. Legs. Base. Base Angles. Vertex Angle. B C vertex P C A What type of triangle is ? Q E D leg leg ABCDE is a regular pentagon base angle base angle R B A base Isosceles Triangle: 1) The 2 congruent sides are known as . 2) The non-congruent side is the . 3) Angles opposite the legs are the . 4) The angle included by the legs is the . Geometry Lesson: Polygons, Triangles

  8. Classifying Triangles According to Angles: Def: A triangle having three acute angles is an triangle. Acute Triangle. Def: A triangle having three congruent angles is an triangle. Equiangular Triangle. Def: A triangle having a right angle is a triangle Right Triangle. Def: A triangle having an obtuse angle is an triangle Obtuse Triangle. Geometry Lesson: Polygons, Triangles

  9. Hypotenuse. Legs. hypotenuse c leg a leg b Right Triangles: 1) The side opposite the right angle is the . 2) The sides opposite the acute angles are . Hypotenuse. 3) The longest side is the . 4) Pythagorean Theorem: Example: A triangle has sides measuring 9, 12, and 14 cm. Show that this triangle is not a right triangle. Geometry Lesson: Polygons, Triangles

More Related