Triangles Teacher Twins©2014.

Slides:

Advertisements

Similar presentations

IDENTIFYING TRIANGLES They are everywhere. IDENTIFY TRIANGLES By sides By angles.

Advertisements

Blue – 2/23/2015 Gold – 2/24/ Name 2 pair of alternate interior angles  5 &  3 and  4 &  1 2. What is the sum of m  1 + m  2 + m  3? 180°

7/3/2015 Geometry 1 Classifying Triangles Free powerpoints at

Classifying Triangles. What do we remember about classifying angles? What are the different types of angles? Acute, right, obtuse, and straight.

HOW MANY SIDES ARE THERE, AND WHAT IS THEIR ANGLE?

Classifying Triangles Students will classify triangles using the lengths of the sides and the angles. S. Calahan October 2010.

Classify Triangles Standard 4C.

Classifying Triangles

Classifying Triangles Angle Measures of Triangles.

Triangles 11.2.

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

Triangle Inequality Notes. Triangle Inequality Theorem  Scalene triangle: A triangle that has no congruent (equal) sides. None of their angles are congruent.

Section 3-4: Parallel Lines and the Triangle Angle-Sum Theorem.

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

4-1 Classifying Triangles

Triangle Classification. Objectives Classify triangles by their angle and side measures Find the sum of the measure of the interior and exterior angles.

Classify triangles by sides No congruent sides Scalene triangle At least two sides congruent Isosceles triangle Three congruent sides Equilateral triangle.

Goal, to classify triangles by their sides and by their angles.

4-1 Triangles and Angles. Theorem 4.1: Triangle Sum The sum of the measures of the interior angles of a triangle is 180 . xx yy zz  x +

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

Triangles and Types of Triangles

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

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.

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.

Warm Up # 4 Classify and name each angle. 1 ab c d.

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.

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.

3.4.  The sum of the measures of the angles of a triangle is 180.

Classify These Triangles by Sides and Angles. Chapter 4 Congruent Triangles Section 4.1: Triangle Sum Properties Todays Objective: Determine if a right.

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.

Who Wants To Be A Millionaire?

Warm Up 5-1 Classify each angle as acute, obtuse, or right

Classify the triangle by its angles and by its sides.

IDENTIFYING TRIANGLES

Geometry 4.1 Triangle and Angles.

TRIANGLES BY ASHANTI.

Section 3-4 Angles of a Triangle.

CLASSIFICATIONS, ANGLES AND MORE!!

Classifying Triangles

Classifying Triangles

IDENTIFYING TRIANGLES

Types of Triangles.

Right Triangle Definition: A triangle with one 90 degree angle.

Objectives -triangle names -remote interior -exterior

Classifying Triangles

Work together to classify the triangle below using its angles and sides.

Classifying Triangles

Objective - To classify triangles.

Triangles Guided Notes

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

Identify type of triangle

Classifying Triangles

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.

Chapter 4: Triangles Classifying Triangles by sides:

3-3 Parallel Lines & the Triangle Angle Sum Theorem

4-1 Vocabulary Acute triangle Equiangular triangle Right triangle

Front of Flipbook Right Triangles Acute Triangles Obtuse Triangles

Triangles Teacher Twins©2014.

Classifying Triangles

Classifying Triangles

4-1 Classifying Triangles

Classifying Triangles

Presentation transcript:

Triangles Teacher Twins©2014

Find the angle measures. Warm Up Find the angle measures. 115⁰ 65⁰ 65⁰ 115⁰ 115⁰ 65⁰ 65⁰ 115⁰

Triangles

Triangle Review ________triangles have three acute angles. ________triangles have one obtuse angle. ________triangles have one right angle. Acute Obtuse Right

Triangle Review __________ triangles have no congruent sides. Scalene __________ triangles have at least two congruent sides. Base angles are congruent. __________ triangles have three congruent sides. Scalene Isosceles Equilateral

Triangles and Angles 65⁰ + 55⁰ + 60⁰ = 180⁰ 65⁰ 55⁰ 60⁰

Exterior Angle of a Triangle 125⁰ 55⁰ Exterior angles Exterior angles 120⁰ 115⁰ 65⁰ 60⁰ Interior angles

Notice that the interior angle + exterior angle = 180⁰

Practice Find x in the right triangle. 39⁰ 51⁰ 66⁰ 2. Find x in the isosceles triangle. 57⁰ 57⁰ x x

3. Find the exterior angle. 132⁰ ? 48⁰

Closure Find x. 3x + 9 = 180 - 9 = - 9 3x = 171 3 3 x x = 57 x + 5 - 9 = - 9 3x = 171 3 3 x x = 57 x + 5 x + 4