Warm Up 11.16.11 Week 5 How many acute angles for each type of triangle? 1) Acute 2) Right 3) equilateral 4) obtuse 3 2 3 2.

Slides:

Advertisements

Similar presentations

4-5 Isosceles and Equilateral Triangles Learning Goal 1. To use and apply properties of isosceles and equilateral triangles.

Advertisements

4-5 Isosceles and Equilateral Triangles. Isosceles Triangles The congruent sides of an isosceles triangle are its legs. The third side is the base. The.

Adapted from Walch Education Isosceles triangles have at least two congruent sides, called legs. The angle created by the intersection of the legs is.

Isosceles Triangles Geometry D – Chapter 4.6. Definitions - Review Define an isosceles triangle. A triangle with two congruent sides. Name the parts of.

4.6 The Isosceles Triangle Theorems Base Angles and Opposite Sides Hypotenuse - Leg.

4.5 - Isosceles and Equilateral Triangles. Isosceles Triangles The congruent sides of an isosceles triangles are called it legs. The third side is the.

4.5 Isosceles and Equilateral Triangles The congruent sides of an isosceles triangle are its legs. The third side is the base. The two congruent legs form.

Isosceles and Equilateral Triangles Chapter 4 Section 5.

4.7.1 USE ISOSCELES AND EQUILATERAL TRIANGLES Chapter 4: Congruent Triangles SWBAT: Define Vertex angle, leg, base, and base angle. State, prove, and use.

Warm Up Week 3 State the number of sides: 1) Equilateral Triangle 2) Rhombus 3) Rectangular Prism.

Isosceles, Equilateral, and Right Triangles Sec 4.6 GOAL: To use properties of isosceles, equilateral and right triangles To use RHL Congruence Theorem.

4.5 Isosceles and Equilateral Triangles. Isosceles Triangles At least two sides are of equal length. It also has two congruent angles. Base Angles Base.

Isosceles and Equilateral Triangles Section 5-1. Isosceles Triangle A triangle with at least two congruent sides. Leg Leg Base Vertex Angle Base Angles.

Warm-Up Find the value of x. x x - 3. GEOMETRY 4-8 Isosceles and Equilateral Triangles.

1 4-5 Isosceles and Equilateral Triangles State and apply the Isosceles Triangle Theorem and its converse State and apply the corollaries for equilateral.

Use Isosceles and Equilateral Triangles

4-6 Isosceles & Equilateral Triangles

Honors Geometry Section 4.4 Isosceles Triangle Theorem

Warmup Which is the correct definition of isosceles? a.) a triangle with at least 2 congruent sides b.) a triangle with exactly 2 congruent sides.

4.5: Isosceles and Equilateral Triangles Objective: To use and apply properties of isosceles and equilateral triangles.

4-5 Isosceles and Equilateral Triangles

CH. 4.7 USE ISOSCELES & EQUILATERAL TRIANGLES. VOCAB Leg: 2 sides of isosceles triangle Leg Vertex Angle: Angle formed by the two legs Base: 3 rd side.

Geometry Ms. Stawicki.  1) To use and apply properties of isosceles triangles.

Triangles Review.

4.7 Use Isosceles & Equilateral Triangles

Section 4-4: The Isosceles Triangle Theorems

5-1 Classifying Triangles

Section 4-5: Isosceles and Equilateral Triangles.

11/18/09 Do Now Have your homework out on your desk. Find all of the angle measures below.

Isosceles and Equilateral Triangles Isosceles Triangle Vocabulary: Vertex Angle – The angle formed by the congruent sides of an isosceles triangle. Base.

Warm Up Week 7 Label the information: AB C D 1) ∠C is a right angle. 2) ∠A ≅ ∠B 3) AB = 8 4) bisects.

Warm Up Week 3 Tell whether it is possible to draw each triangle: 1) right isosceles triangle 2) scalene equiangular triangle 3) right scalene.

Isosceles Triangle ABC Vertex Angle Leg Base Base Angles.

4.6: Isosceles and Equilateral Triangles

Triangle Sum Theorem The sum of the angle measures in a triangle is 180 degrees.

4.3 Isosceles & Equilateral Triangles Geometry Big Daddy Flynn 2013.

Isosceles Triangle Theorem (Base Angles Theorem)

Triangle Congruence 4.5 Isosceles and Equilateral Triangles.

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

Applied Geometry Lesson: 6 – 4 Isosceles Triangles Objective: Learn to identify and use properties of isosceles triangles.

Triangles and Their Angles Geometry – Section 4.1.

Isosceles Triangles A B C

3.6 Types of Triangles Objective:

Isosceles and Equilateral Triangles

4.5 Isosceles and Equilateral Triangles

4-5 Isosceles and Equilateral Triangles

Warm Up [On back counter]

4.7 Use Isosceles and Equilateral Triangles

Isosceles & Equilateral Triangles

Proving Theorems about Isosceles Triangles (5.6.2)

Section 4.5 isosceles & equilateral triangles

The Isosceles Triangle Theorems

Triangles Review.

Objective: To use and apply properties of isosceles triangles.

4.5 - Isosceles and Equilateral Triangles

(The Isosceles Triangle Theorems)

The Isosceles Triangle Theorems

DRILL Write the converse of the statement:

7.2 Isosceles and Equilateral Triangles

Honors Geometry Section 4.4 Isosceles Triangle Theorem

4.7 Use Isosceles and Equilateral Triangles

Isosceles, Equilateral, and Right Triangles

Lesson: 5.1 Special Segments in Triangles Pages: 238 – 241 Objectives:

Isosceles and Equilateral Triangles

Isosceles, Equilateral, and Right Triangles

(The Isosceles Triangle Theorems)

4.8 – Use Isosceles and Equilateral Triangles

Equilateral TRIANGLES

Isosceles and Equilateral Triangles

Module 15: Lesson 2 Isosceles & Equilateral Triangles

Presentation transcript:

Warm Up Week 5 How many acute angles for each type of triangle? 1) Acute 2) Right 3) equilateral 4) obtuse

Geometry 4.6 Day 1 I will use properties of isosceles triangles. Ex 1 IsoscelesA triangle with two congruent sides. Vertex Angle Leg Base Base Angles

Ex 2 Base Angles Theorem If two sides of a triangle are congruent, then the angles opposite them are congruent. Theorem 4.6 A B C If ≅, then ∠ B ≅ ∠ C.

A B C Ex 2 Base Angles Theorem Converse If two angles of a triangle are congruent, then the sides opposite them are congruent. Theorem 4.7 then ≅. If ∠ B ≅ ∠ C,

Ex 2 ∠ B ≅ ∠ C Prove: In ∆ABC, ≅ Given: A B C D 2) ∠ CAD ≅ ∠ BAD Definition of bisector Bisects ∆CAB 1) 3) ≅ 4) ∆CAD ≅ ∆BAD SAS Reflexive Property 5) ∠ B ≅ ∠ C CPCSC

Ex 3 xº yº 47º Solve for x and y: y = 47x = x = 86

Do: 1 Assignment: Textbook Page 239, all. Prove: ≅ Q S R P T