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

Slides:

Advertisements

Similar presentations

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

Advertisements

Lesson 3-2: Isosceles Triangle

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

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

4.7 – Isosceles Triangles Geometry Ms. Rinaldi. Isosceles Triangles Remember that a triangle is isosceles if it has at least two congruent sides. When.

4.7 – Use Isosceles and Equilateral Triangles You know that a triangle is isosceles if it has at least two congruent sides. When an isosceles triangle.

The Isosceles Triangles Theorems Section 4-6 Isosceles Triangle Theorem  If 2 sides of a triangle are congruent, then the angles opposite those sides.

ISOSCELES TRIANGLES 1 Modified by Lisa Palen. PARTS OF AN ISOSCELES TRIANGLE An isosceles triangle is a triangle with at least two congruent sides. The.

Triangles Isosceles & Fundamentals

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.

NAME:_________________ DATE:_________________ Unit #4 Activity 2—Isosceles Triangles Geometry CP Diaz/Cassidy Unit 4 ASSIGNMENT #19 Directions: Activity.

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.

Properties of Special Triangles 4-5 Objective: To use and apply properties of 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

Quiz Tell whether the pair of triangles is congruent or not and why

4-6 Isosceles & Equilateral Triangles

Honors Geometry Section 4.4 Isosceles Triangle Theorem

4-5 Isosceles and Equilateral Triangles

1 Isosceles and Equilateral Triangles. 2 Parts of an Isosceles Triangle An isosceles triangle is a triangle with two congruent sides. The congruent sides.

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.

5.4 – Equilateral and Isosceles Triangles

Section 4-4: The Isosceles Triangle Theorems

Section 4-5: Isosceles and Equilateral Triangles.

Warm-up. Legs: Congruent sides Of an isosceles triangle Base: Third side of an Isosceles triangle Vertex Angle: the angle the two legs form Base Angle:

Wednesday, September 26, 2012 Homework: p. 185 #31, 34, 43 & 44 (36-42 mentally)

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

4.6: Isosceles and Equilateral Triangles

4.3 ISOSCELES AND EQUILATERAL TRIANGLES. VOCABULARY Two angles of an isosceles triangle are always congruent. These are the angles opposite the congruent.

Isosceles Triangle Theorem (Base Angles Theorem)

Triangle Congruence 4.5 Isosceles and Equilateral Triangles.

Lesson 3.3 Classifying Triangles & Triangle Angle-Sum Theorem Do Now: Find the measure of angle and x+12 are complementary. 62+x+12 = 90 degrees.

October 8,  As we discussed in a previous section isosceles triangles are triangles with at least two sides congruent.  The two congruent sides.

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

Use isosceles and equilateral triangles

Isosceles and Equilateral Triangles

4-5 Isosceles and Equilateral Triangles

Warm Up [On back counter]

Isosceles Triangles.

Objectives Prove theorems about isosceles and equilateral triangles.

Lesson 3-2: Isosceles Triangle

4.7 – Use Isosceles and Equilateral Triangles

Lesson 4.6 Isosceles Triangles.

Isosceles & Equilateral Triangles

Proving Theorems about Isosceles Triangles (5.6.2)

Section 4.5 isosceles & equilateral triangles

Triangles Review.

Lesson 3-2 Isosceles Triangles.

4.5 - Isosceles and Equilateral Triangles

(The Isosceles Triangle Theorems)

Inside angles theorem.

The Isosceles Triangle Theorems

7.2 Isosceles and Equilateral Triangles

Mod 15.2: Isosceles and Equilateral Triangles

Honors Geometry Section 4.4 Isosceles Triangle Theorem

Isosceles, Equilateral, and Right Triangles

Base Angles & Exterior Angles

5.4 Isosceles and Equilateral Triangles.

Isosceles, Equilateral, and Right Triangles

(The Isosceles Triangle Theorems)

4.8 – Use Isosceles and Equilateral Triangles

Equilateral TRIANGLES

Lesson 3-2 Isosceles Triangles.

Module 15: Lesson 2 Isosceles & Equilateral Triangles

Lesson 3-2 Isosceles Triangles.

ISOSCELES TRIANGLES Section 4-6 spi.3.2.A Jim Smith JCHS.

Presentation transcript:

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

Isosceles Triangles a triangle with at least 2 congruent sides

Isosceles Triangle The congruent sides are called the legs of a triangle. The angle formed by the legs is the vertex angle. The side of the triangle opposite the vertex angle is the base. The angles that have the base as a side are the base angles.

Isosceles Triangle Theorem If two sides of a triangle are congruent, the angles opposite them are congruent.

Converse Isosceles Triangle Theorem If two angles of a triangle are congruent, the sides opposite them are congruent.