TODAY IN GEOMETRY…  Review 4.1 concepts  Learning Goal: 4.2 Identify Congruent Triangles  Independent practice  Ch.4 QUIZ-Thursday/Friday.

Slides:

Advertisements

Similar presentations

Triangles TOPIC 9 LESSON 9-5.

Advertisements

TODAY IN GEOMETRY…  STATs on Ch. 3 Test  Learning Target: 4.1 Classify Triangles and find measures of their angles  Independent Practice.

TODAY IN GEOMETRY…  Review for CH. 4 QUIZ  CH. 4 QUIZ – TODAY!  Learning Goal: 4.3 You will use the side lengths to prove triangles are congruent. 

Blue – 2/23/2015 Gold – 2/24/ Name 2 pair of alternate interior angles  5 &  3 and  4 &  1 2. What is the sum of m  1 + m  2 + m  3? 180°

TODAY IN GEOMETRY…  Warm Up: Advanced Angles Practice  Review for CH. 4 QUIZ  CH. 4 QUIZ – TODAY!

Applying Triangle Sum Properties

ADVANCED GEOMETRY 3.6 Types of Triangles LEARNER OBJECTIVE: Students will classify triangles by sides and by angles and will complete problems and proofs.

Classifying Triangles Students will classify triangles using the lengths of the sides and the angles. S. Calahan October 2010.

Triangles 1 The Basics. 2 Naming Triangles For example, we can call the following triangle: Triangles are named by using its vertices. ∆ABC∆BAC ∆CAB∆CBA∆BCA.

Classify Triangles Standard 4C.

Lesson 2.1 Classifying Triangles Triangle- a closed figure in a plane that is the union of three segments endpoint to endpoint. Interior Angle- an angle.

Triangles Review.

Section 4.1 Classifying Triangles

Classifying Triangles Angle Measures of Triangles.

Triangles 11.2.

Warmup – grab a book Room , submit answers for x and y.

Section 3-4: Parallel Lines and the Triangle Angle-Sum Theorem.

Objectives: Classify triangles and find the measures of their angles Use the exterior angles of triangles.

Triangles Geometry Mr. Zampetti Unit 3, Day 1. Today’s Objectives To learn new strategies that will help find the measures of angles in a triangle To.

GEOMETRY 4-1 Classifying Triangles. 4-1 Classifying Triangles By angle measures: Acute Triangle: 3 acute angles Right Triangle: 1 right angle Obtuse Triangle:

4-1 Classifying Triangles

Triangle Classification. Objectives Classify triangles by their angle and side measures Find the sum of the measure of the interior and exterior angles.

Classify triangles by sides No congruent sides Scalene triangle At least two sides congruent Isosceles triangle Three congruent sides Equilateral triangle.

Goal, to classify triangles by their sides and by their angles.

4-1 Triangles and Angles. Theorem 4.1: Triangle Sum The sum of the measures of the interior angles of a triangle is 180 . xx yy zz  x +

Geometry Section 4.1 Triangle Sum Theorem. A triangle is the figure formed by three line segments joining three noncollinear points. A B C.

Classifying Triangles How many degrees can be found in all triangles? 180 We can classify triangles 2 ways: By their angles By their sides.

Triangles and Angles Classifying Triangles. Triangle Classification by Sides Equilateral 3 congruent sides Isosceles 2 congruent sides Scalene No congruent.

4.1 Classifying Triangles textbook page 173 Classification by Sides  Equilateral – 3 congruent sides  Isosceles – 2 congruent sides  Scalene – no.

Classifying Triangles. Two Ways to Classify Triangles  By Their Sides  By Their Angles.

Scalene triangle: A scalene triangle is a triangle that has no equal sides. The following is a scalene triangle.

Lesson 8.3 Concept: How to classify triangles by their sides and angles. An equilateral triangle has three sides of the same length. An isosceles triangle.

Triangles The sum of the measures of the angles of a triangle is 180 degrees. m A + m B + m C = 180 o A BC An angle formed by a side and an extension.

Triangles Chapter What is the sum of the angles inside a triangle? 180º? Prove it m Given A B C Angle Addition Postulate/Definition of a Straight.

Triangles and Their Angles Geometry – Section 4.1.

3-4 Angles of a Triangle. A Triangle is a figure formed by three segments joining three noncollinear points. 1) Classifying triangles by their sides.

3.6 Types of Triangles Advanced Geometry. Definitions (Index Cards)  Scalene triangle – a triangle in which no two sides are congruent.  Isosceles triangle.

Classify These Triangles by Sides and Angles. Chapter 4 Congruent Triangles Section 4.1: Triangle Sum Properties Todays Objective: Determine if a right.

4.1 Triangle Angle Sum and Properties. How many degrees in a triangle? The sum of the angles in any triangle is exactly 180 degrees.

Warm Up 5-1 Classify each angle as acute, obtuse, or right

Classify the triangle by its angles and by its sides.

Chapter 4: Congruent Triangles

Geometry 4.1 Triangle and Angles.

TRIANGLES BY ASHANTI.

Section 3-4 Angles of a Triangle.

Triangles Review.

Classifying Triangles

Classifying Triangles

Objectives -triangle names -remote interior -exterior

Triangles Grade 4.

4.1 Classifying Triangles

Classifying Triangles

Objective - To classify triangles.

Add up all the sides Perimeter of Area of a Rectangle: ANY polygon:

Drill 1) x = 180, solve for x 2) How many degrees do the interior angles of a triangle add up to. 3) What type of triangle has an angle that.

Chapter 4: Triangles Classifying Triangles by sides:

3-3 Parallel Lines & the Triangle Angle Sum Theorem

4-1 Vocabulary Acute triangle Equiangular triangle Right triangle

Unit 4A – Geometric Figures Lesson 3 Triangles

5-7 Isosceles and Equilateral Triangles

Triangles Lesson 10-4.

Classifying Triangles

Geometry 3.4 Angles of a Triangle.

Classifying Triangles

4-1 Classifying Triangles

Presentation transcript:

TODAY IN GEOMETRY…  Review 4.1 concepts  Learning Goal: 4.2 Identify Congruent Triangles  Independent practice  Ch.4 QUIZ-Thursday/Friday

REVIEW: Ways to classify triangles by SIDES: Scalene – no congruent sides Isosceles – 2 congruent sides Equilateral – All congruent sides Ways to classify triangles by ANGLES: Acute – All angles less than 90 degrees Right – One angle is 90 degrees Obtuse – One angle is greater than 90 degrees Equiangular – All angles are congruent

1 23 <1 + <2 + <3 = <1 + <2 = <4 Triangle Sum Theorem Exterior Angle Theorem

Congruent Figures: All the parts of one figure are congruent to the corresponding parts of the other figure. Corresponding Parts: Corresponding sides and corresponding angles. A B C D E F

J K L T R S

Third Angles Theorem: If two angles of one triangle are congruent to two angles of another triangle, then the third angles are also congruent. SO

A B C D

HOMEWORK #3: Pg. 228: 3-10, 15-16, Pg. 231: If finished, work on other assignments: HW #1: 221: 1-26, 32, HW #2: Advanced Angles WS