Lesson 4-5: Isosceles and Triangles · If a triangle is equilateral, it is equiangular. (and...

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Geo NOTES Date: _____ Isosceles Triangle: at least two congruent sides (legs), and two congruent angles (base angles) Isosceles Triangle Theorem: If two sides of a triangle are congruent, then the angles opposite those sides are also congruent. Converse of Isosceles Triangle Theorem: If two angles of a triangle are congruent, then the sides opposite the angles are congruent. Lesson 4-5: Isosceles and Equilateral Triangles

Transcript of Lesson 4-5: Isosceles and Triangles · If a triangle is equilateral, it is equiangular. (and...

Page 1: Lesson 4-5: Isosceles and Triangles · If a triangle is equilateral, it is equiangular. (and vice-versa) 1. The perimeter is 54 feet. Find the value of “x” & “y”, and the

Geo NOTES Date: _____

Isosceles Triangle: at least two congruent sides (legs), and two congruent angles (base angles)

Isosceles Triangle Theorem: If two sides of a triangle are congruent, then the angles opposite

those sides are also congruent.

Converse of Isosceles Triangle Theorem: If two angles of a triangle are congruent, then the

sides opposite the angles are congruent.

Lesson 4-5: Isosceles and Equilateral Triangles

Page 2: Lesson 4-5: Isosceles and Triangles · If a triangle is equilateral, it is equiangular. (and vice-versa) 1. The perimeter is 54 feet. Find the value of “x” & “y”, and the

Theorem: The bisector of the vertex angle of an isosceles triangle is also the perpendicular

bisector of the base.

Page 3: Lesson 4-5: Isosceles and Triangles · If a triangle is equilateral, it is equiangular. (and vice-versa) 1. The perimeter is 54 feet. Find the value of “x” & “y”, and the
Page 4: Lesson 4-5: Isosceles and Triangles · If a triangle is equilateral, it is equiangular. (and vice-versa) 1. The perimeter is 54 feet. Find the value of “x” & “y”, and the

If a triangle is equilateral, it is equiangular. (and vice-versa)

1. The perimeter is 54 feet. Find the value of “x” & “y”, and the length of each side.

2. Find the value of “t”. 3. Find the value of “z”.

HOMEWORK: Practice Worksheet 4.5


Isosceles and Equilateral Triangles.pdf

Isosceles and Equilateral Triangles.pdf

Use isosceles and equilateral triangles

Use isosceles and equilateral triangles

4.7 use isosceles and equilateral triangles

4.7 use isosceles and equilateral triangles

7.2 Isosceles and Equilateral Triangles.notebook€¦ · 7.2 Isosceles and Equilateral Triangles.notebook January 04, 2017 Try This: pg 289; 4-13, 15-18

7.2 Isosceles and Equilateral Triangles.notebook€¦ · 7.2 Isosceles and Equilateral Triangles.notebook January 04, 2017 Try This: pg 289; 4-13, 15-18

Isosceles and Equilateral Triangles · SWBAT: Apply Properties of Isosceles and Equilateral Triangles HW: Pages 22-23 40 40 x 𝒙+ + = x = 100 Title Isosceles and Equilateral Triangles

Isosceles and Equilateral Triangles · SWBAT: Apply Properties of Isosceles and Equilateral Triangles HW: Pages 22-23 40 40 x 𝒙+ + = x = 100 Title Isosceles and Equilateral Triangles

Geometry Triangles - NJCTLcontent.njctl.org/courses/math/archived-courses... · C isosceles D obtuse E equilateral F equiangular G scalene 26° 128° 26° 2.5 2.5 4.5 Slide 38 / 210

Geometry Triangles - NJCTLcontent.njctl.org/courses/math/archived-courses... · C isosceles D obtuse E equilateral F equiangular G scalene 26° 128° 26° 2.5 2.5 4.5 Slide 38 / 210

44-9-9 Isosceles and Equilateral Triangles4-9 Isosceles and Equilateral Triangles Recall that an isosceles triangle has at least two congruent sides. The congruent sides are called

44-9-9 Isosceles and Equilateral Triangles4-9 Isosceles and Equilateral Triangles Recall that an isosceles triangle has at least two congruent sides. The congruent sides are called

4.6 Isosceles, Equilateral, and Right Triangles

4.6 Isosceles, Equilateral, and Right Triangles

Isosceles and Equilateral Triangles EXAMPLE,3 B. Find the ...€¦ · Isosceles and Equilateral Triangles Isosceles Triangle leg base angles vertex Isosceles and Equilateral Triangles

Isosceles and Equilateral Triangles EXAMPLE,3 B. Find the ...€¦ · Isosceles and Equilateral Triangles Isosceles Triangle leg base angles vertex Isosceles and Equilateral Triangles

Geometry CH 4-2 Isosceles & Equilateral Triangles Prove theorems about isosceles and equilateral triangles. Apply properties of isosceles and equilateral.

Geometry CH 4-2 Isosceles & Equilateral Triangles Prove theorems about isosceles and equilateral triangles. Apply properties of isosceles and equilateral.

4.8 Use Isosceles and Equilateral Triangles You will use theorems about isosceles and equilateral triangles. Essential Question: How are the sides and.

4.8 Use Isosceles and Equilateral Triangles You will use theorems about isosceles and equilateral triangles. Essential Question: How are the sides and.

Isosceles, Equilateral, and Right Triangles

Isosceles, Equilateral, and Right Triangles

5.4 Equilateral and Isosceles Triangles · 1/5/2018  · 5.4 Equilateral and Isosceles Triangles Spiral Review: Sketch and correctly label the following. Sketch an Equilateral Triangle:

5.4 Equilateral and Isosceles Triangles · 1/5/2018  · 5.4 Equilateral and Isosceles Triangles Spiral Review: Sketch and correctly label the following. Sketch an Equilateral Triangle:

Isosceles and equilateral triangles - Congruence - Missing angle · x ∠ ∠ ∠ ∠ ∠

Isosceles and equilateral triangles - Congruence - Missing angle · x ∠ ∠ ∠ ∠ ∠

[PPT]Isosceles Triangles - Windham Math / FrontPagewindhammath.pbworks.com/w/file/fetch/46959914/Isosceles... · Web viewIt’s an EQUILATERAL, EQUIANGULAR triangle. Draw an example

[PPT]Isosceles Triangles - Windham Math / FrontPagewindhammath.pbworks.com/w/file/fetch/46959914/Isosceles... · Web viewIt’s an EQUILATERAL, EQUIANGULAR triangle. Draw an example

Chapter 4 4-9 Isosceles and Equilateral Triangles.

Chapter 4 4-9 Isosceles and Equilateral Triangles.

4-6 Isosceles And Equilateral Triangles

4-6 Isosceles And Equilateral Triangles

[PPT]Isosceles, Equilateral, and Right Triangles · Web viewIsosceles, Equilateral, and Right Triangles Chapter 4.6 Isosceles Triangle Theorem Isosceles The 2 Base s are Base angles

[PPT]Isosceles, Equilateral, and Right Triangles · Web viewIsosceles, Equilateral, and Right Triangles Chapter 4.6 Isosceles Triangle Theorem Isosceles The 2 Base s are Base angles

Isosceles and Equilateral Triangles

Isosceles and Equilateral Triangles

44-9-9 Isosceles and Equilateral Triangles McDougal Geometry 44-9-9 Isosceles and Equilateral TrianglesIsosceles and Equilateral Triangles Holt Geometry Warm Up Lesson Presentation

44-9-9 Isosceles and Equilateral Triangles McDougal Geometry 44-9-9 Isosceles and Equilateral TrianglesIsosceles and Equilateral Triangles Holt Geometry Warm Up Lesson Presentation