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Published byVictoria Riley
Modified over 3 years ago
Triangles By Christine Berg Edited By VTHamilton
Triangles Can be classified by the number of congruent sides
Scalene Triangle Has no congruent sides
Isosceles Triangle Has at least two congruent sides
Equilateral Triangle Has three congruent sides
Triangles Can be classified by the angle measures
Right Triangle Has one right angle
Acute Triangle Has three acute angles
Obtuse Triangle Triangle with one obtuse angle
Triangles Cut any shape triangle out of a sheet of paper
Triangles Tear off the corners. Piece them together by having the corners touch.
Triangles The corners form what type of angle?
Triangles The sum of the angles of a triangle is 180 degrees
Triangles To find a missing angle, add up the 2 given angles
Triangles Subtract the sum from 180 and you have the missing angle
Have the same SIZE and the same SHAPE
Congruent Triangles May be flipped and/or rotated
Congruent Triangles BE CAREFUL WHEN YOU NAME THE SHAPE
Congruent Triangles Name congruent CORRESPONDING parts (sides and angles) IN ORDER
Congruent Triangles Make sure the letters are in CORRESPONDING order
ABC is congruent to DEF A B C D E F
One for you Name the congruent triangles remembering to name the angles in order X Y D E F Z
Classifying Triangles. Two Ways to Classify Triangles By Their Sides By Their Angles.
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.
Triangles Objective: Learn to name and classify triangles.
Classify Triangles Classify triangles by the lengths of their sides and their angles.
Classifying Triangles Students will classify triangles using the lengths of the sides and the angles. S. Calahan October 2010.
Introduction to Angles and Triangles. Degrees: Measuring Angles We measure the size of an angle using degrees. Example: Here are some examples of angles.
Triangles Report by Jennifer Johnson. What is a Triangle? A polygon Three sides Three angles.
Activity You can find the sum of the angle measures in a triangle. Triangles Cut a triangle from the corner of a piece of paper. Label the corners.
Triangles Galore! Classification By Angle Acute triangle Obtuse triangle Right triangle.
Classifying Triangles Lesson Classifying by Angle Acute triangles have three acute angles. Obtuse triangles have one obtuse angle. Right triangles.
Warm Up Types of Triangle Chapter 3.6 Objective- name the various types of triangles and their parts.
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.
Name the Angle in four different ways 1) Use the vertex and a point from each side. ABC or CBA The vertex letter is always in the middle. 2) Use the vertex.
Classify Triangles Standard 4C. What is a Triangle? A triangle is a polygon with 3 sides. A triangle can be formed from three line segments if and only.
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 Sum. Types of Triangles…… Scalene Triangle: A triangle with no 2 sides of equal length.
Classifying Triangles. Classifying Triangles By Their Angles Acute Right Obtuse.
Classifying Triangles. What do we remember about classifying angles? What are the different types of angles? Acute, right, obtuse, and straight.
Triangles and Angles. Classifying Triangles Line segments are congruent if they have the same length One way to classify triangles is by the number of.
Introduction to Triangles. Triangles Can be classified by the angle measures.
They come in many shapes and sizes! 3 measure angles –Acute –Right –Obtuse 3 measure sides –Scalene –Isosceles –Equilateral There are 6 types of triangles.
Lesson 10-4 Pages Triangles. What you will learn! How to identify and classify triangles.
Triangles and Angles Classifying Triangles. Triangle Classification by Sides Equilateral 3 congruent sides Isosceles 2 congruent sides Scalene No congruent.
Equilateral, Isosceles, Scalene, Right, Acute, Obtuse Types of Triangles.
Exploring Angles in a Triangles Chapter 8 Lesson 4 Image Taken from:
4-1 Classifying Triangles Objectives: The student will be able to: 1. Identify and classify triangles by angle measures and side measures.
Scalene triangle: A scalene triangle is a triangle that has no equal sides. The following is a scalene triangle.
EQUILATERAL & ISOSCELES Quiz tomorrow. CLASSIFY the triangle by ANGLES and SIDES Angles: acute, obtuse, right Sides:equilateral, isosceles, scalene 91.
TRIANGLES TOPIC 9 LESSON 9-5. Triangles can be classified by their sides. 3 equal sides equilateral triangle.
Types of Triangles. Angles The angles in a triangle add up to o + 60 o + 60 o =
DO NOW 1) X = 180 2) 55 + X = 180 3) X + 58 = 90 4) 31 + X = 90.
GEOMETRY 4-1 Classifying Triangles. 4-1 Classifying Triangles By angle measures: Acute Triangle: 3 acute angles Right Triangle: 1 right angle Obtuse Triangle:
5-3 Triangles Learn to find unknown angles and identify possible side lengths in triangles.
GEOMETRY 4-1 Classifying Triangles. Acute Triangle Three acute angles Triangle Classification By Angle Measures.
7/3/2015 Geometry 1 Classifying Triangles Free powerpoints at
Triangle A polygon with three sides and three angles. A triangle can be names by its’ side lengths and angles. – Side lengths: isosceles, equilateral,
10.1 Triangles. Acute Triangle Not Acute Triangles.
Classifying Triangles Add the following to your math notes.
Geometry. A figure formed when three noncollinear points are connected by segments is a triangle. Each pair of segments forms an angle on the triangle.
10-4 Triangles pages Indicators G3b- Use triangle sum relationships to solve problems. G4- Determine necessary conditions for congruence of triangles.
Warm Up # 4 Classify and name each angle. 1 ab c d.
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.
Review: Classifying Triangles and The Triangle Angle Sum Theorem.
HOW MANY SIDES ARE THERE, AND WHAT IS THEIR ANGLE?
TRIANGLES AND TYPES OF TRIANGLES. A triangle has three sides.
Transparency 4 Click the mouse button or press the Space Bar to display the answers.
Triangles Classification by sides Equilateral has all sides congruent Isosceles has 2 congruent sides Scalene has no congruent sides.
Pre-Algebra 5.3 Triangles. Solve each equation x + 37 = x = x + x + 18 = = 2x x x = 81 x = 79 x = 81.
Wednesday, September 26, 2012 Homework: p. 185 #31, 34, 43 & 44 (36-42 mentally)
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