D B A C 3.2—Isosceles and Equilateral Triangles. Objective: Use properties of _, and __triangles. equilateral Vocabulary:

Slides:

Advertisements

Similar presentations

Triangles TOPIC 9 LESSON 9-5.

Advertisements

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

By Trissy Brandvold. What type of triangle is this? equilateral triangle right triangle isosceles triangle.

All about Shapes Ask Boffin!.

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.

Mrs. McConaughyGeometry1 Isosceles and Equilateral Triangles Objective: To use and apply properties of isosceles triangles.

Isosceles Triangles Section 4.3.

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.

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

4-6 Isosceles & Equilateral Triangles

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

Section 4-5: Isosceles and Equilateral Triangles.

Types of 2 D Shapes and There Properties 1)A shape with 3 sides is called a triangle 2)A shape with 4 sides is called a quadrilateral 3)The general term.

Triangle A polygon with three sides and three angles. A triangle can be names by its’ side lengths and angles. – Side lengths: isosceles, equilateral,

©G Dear2008 – Not to be sold/Free to use

TRIANGLES AND TYPES OF TRIANGLES. A triangle has three sides.

Types of Triangles. Equilateral Triangle All sides are the same length and all the angles are the same length.

Triangles 1st year P26 Chapter 4.

Triangles Who Wants To Be A Millionaire? Question 1.

Triangles Shapes with 3 sides! Equilateral Triangle All 3 Sides are equal in Length All 3 interior angles are the same.

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

Triangle Congruence 4.5 Isosceles and Equilateral Triangles.

Time for Triangles. What is a triangle? A triangle is a polygon. It has 3 sides and 3 angles. It can also be called a trigon.

Isosceles Triangles Theorems Theorem 8.12 – If two sides of a triangle are equal in measure, then the angles opposite those sides are equal in measure.

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

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

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.

Properties of Triangles

The Angles in a Triangle Take a piece of card board Cut a triangle – making sure all 3 lines are straight Mark each angle with a DOT Cut the three angles.

Mathematics Types of Triangles.

Who Wants To Be A Millionaire?

Angles In Triangles Types of Triangles Isosceles triangle

All about Triangles Ask Boffin!.

Objectives: Use properties of isosceles and equilateral triangles

Warm Up [On back counter]

Classifying Triangles

Objectives Prove theorems about isosceles and equilateral triangles.

4.7 – Use Isosceles and Equilateral Triangles

Isosceles & Equilateral Triangles

Properties of Triangles

Classifying Triangles

Angles In Triangles Types of Triangles Isosceles triangle

Properties of Triangles

Angles In Triangles Types of Triangles Isosceles triangle

Lesson 9 Lines & Angles Special Triangles.

Classifying Triangles

Objective - To classify triangles.

7.2 Isosceles and Equilateral Triangles

Identify type of triangle

Types of Triangles Thursday, 11 April 2019.

Types of Triangles Thursday, 11 April 2019.

5.4 Isosceles and Equilateral Triangles.

Front of Flipbook Right Triangles Acute Triangles Obtuse Triangles

Equilateral TRIANGLES

TWO SIDES-ANGLE AND PERIMETER-RATIO

The Super 9 – Angles GOOD – calculate the missing angles

Area and Perimeter Triangles.

Presentation transcript:

D B A C 3.2—Isosceles and Equilateral Triangles

Objective: Use properties of _______________, and ________________triangles. equilateral Vocabulary: Perimeter of a Triangle: the ________ of the ______________ of all the sides of a triangle. sumlengths isosceles

Examples: Find the values of x and y. 1) x° y° What do I know about the sides? Equal or Unequal? What do I know about the angles?

Examples: Find the values of x and y. 2) What do I know about the sides? Equal or Unequal? 6x – 4 20

Examples: Find the values of x and y. 3) What do I know about the sides? Equal or Unequal? What do I know about the angles?

4. 5. What do I know about the sides? Equal or Unequal? What do I know about the angles? What do I know about the sides? Equal or Unequal? What do I know about the angles?

6. 7. What do I know about the sides? Equal or Unequal? What do I know about the angles? What do I know about the sides? Equal or Unequal? What do I know about the angles?

The vertex angle of an isosceles triangle measures (a + 15)°, and one of the base angles measures 7a°. Find a and each angle measure. 8.

A B 9.

C D D E 10.