Slides:

Advertisements

Similar presentations

Angles In Triangles Types of Triangles Isosceles triangle

Advertisements

Triangles TOPIC 9 LESSON 9-5.

ANGLES IN TRIANGLES LESSON 16(3).

Classify Triangles Standard 4C.

Review: Classifying Triangles and The Triangle Angle Sum Theorem

EQUILATERAL & ISOSCELES Quiz tomorrow. CLASSIFY the triangle by ANGLES and SIDES Angles: acute, obtuse, right Sides:equilateral, isosceles, scalene 91.

- Four sides - Four angles - Four vertices  - The diagonals are equal in length and perpendicular and bisect each other.

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.

What is a triangle A plane figure, created by connecting three points that are not in the same line. Three – side polygon whose angles add up to 180°

Types of Triangles. Angles The angles in a triangle add up to o + 60 o + 60 o =

TRIANGLES SPI: Identify, define or describe geometric shapes given a visual representation or written description of its properties.

Triangles Who Wants To Be A Millionaire? Question 1.

Warm Up Types of Triangle Chapter 3.6 Objective- name the various types of triangles and their parts.

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

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

Triangles Objective: Learn to name and classify 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.

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.

Classifying Triangles Lesson Classifying by Angle Acute triangles have three acute angles. Obtuse triangles have one obtuse angle. Right triangles.

Sum of Angles in Triangles. Triangles classified by sides A scalene triangle has no congruent sides. An isosceles triangle has at least 2 congruent sides.

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.

Properties of Triangles

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.

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!.

Classifying Triangles

Geometry 4.1 Triangle and Angles.

Properties of Triangles

Classifying Triangles

Angles In Triangles Types of Triangles Isosceles triangle

Properties of Triangles

Classifying Triangles

Triangles Created by G. Antidormi 2005.

Angles In Triangles Types of Triangles Isosceles triangle

Types of Triangles.

Classifying Triangles

Classifying Triangles

Objective - To classify triangles.

Triangles Guided Notes

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

Angle Measure in Triangles

Identify type of triangle

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.

Types of Triangles Thursday, 11 April 2019.

Types of Triangles Thursday, 11 April 2019.

Front of Flipbook Right Triangles Acute Triangles Obtuse Triangles

TWO SIDES-ANGLE AND PERIMETER-RATIO

Classifying Triangles

The Super 9 – Angles GOOD – calculate the missing angles

Presentation transcript:

Angles in a triangle add up to 180°

Angles in a triangle add up to 180°

Angles in a triangle add up to 180°

Angles in a triangle add up to 180°

Angles in a triangle add up to 180°

Properties of Triangles

Properties of Triangles Types of Triangles Isosceles triangle 2 equal sides 2 equal angles (base) Equilateral Triangle 3 equal sides 3 equal angles. Scalene triangle 3 unequal sides 3 unequal angles

Any triangle containing a 90o angle is a right-angled triangle An isosceles or a scalene triangle may contain a right angle. Right-angled isosceles triangles. Right-angled scalene triangle.

How can we use this to help us? To determine the angle sum of any Triangle How can we use this to help us? Take 3 identical copies of this triangle and put them together, so: 3 1 2 Angles on a straight line add to 180o These are the same angles as in the triangle! Angles in a triangle add up to 1800

1. 2. 3. 4. 5. Types of Triangles Equilateral Triangle 3 equal sides 3 equal angles. Isosceles triangle 2 equal sides 2 equal angles (base) Scalene triangle 3 unequal sides 3 unequal angles 1. 2. 3. 4. 5. Any triangle containing a 90o angle is a right-angled triangle The angle sum of a triangle = 1800