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► Polygon : is a closed plane figure formed by three or more segments called sides. ► Vertex : is the point at which two sides of a polygon meet.
► The figure below is not a polygon, since it is not a closed figure:
► The figure below is not a polygon, since it is not made of line segments:
► The figure below is not a polygon, since its sides do not intersect in exactly two places each:
► There are two types of polygons: REGULAR AND IRREGULAR examples of regular polygons examples of irregular polygons
► The sum of the angles of a triangle is 180 degrees. TRIANGLES Equilateral Triangle An equilateral triangle has three sides of equal length. This means that each angle is 60 degrees
► A scalene triangle has three sides with different lengths. Therefore, it has three different angles.
► Acute Triangle : An acute triangle has three acute angles.
Obtuse Triangle ► An obtuse triangle has an obtuse angle, in which one of the angles is more than 90 degrees.
Right Triangle A right triangle has a right angle, in which one of the angles is 90 degrees. A right triangle has a right angle, in which one of the angles is 90 degrees.
► A quadrilateral is a four-sided polygon in which the sum of all the angles is 360 º
What type of polygon is on the sides of these pyramids?
What type of polygon is in these beehives?
What type of polygon do you see in this photo?
Geometry – Grade 5 2-D Shapes. Vocabulary You Need to Know! Point An exact, specific position Line Extends to infinity in both directions from a specific.
POLYGONS 2D SHAPES. A Polygon is a closed figure made by joining line segments. Which of the following figures is a polygon? A B C Why?
Triangle A polygon with three sides and three angles. A triangle can be names by its’ side lengths and angles. – Side lengths: isosceles, equilateral,
Polygons are many-sided figures, with sides that are line segments. Polygons are named according to the number of sides and angles they have. Can.
Abney V. Martinez. Tell which shapes are polygons. A polygon is a closed plane figure made up of line segments. Each line segment is a side. The.
Exploring. Polygons are many-sided figures, with sides that are line segments. Polygons are named according to the number of sides and angles they.
TRIANGLES AND TYPES OF TRIANGLES. What is a TRIANGLE ? A closed figure formed by joining three line segments is called a TRIANGLE.
TRIANGLES SPI: Identify, define or describe geometric shapes given a visual representation or written description of its properties.
Classifying Triangles. Two Ways to Classify Triangles By Their Sides By Their Angles.
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.
Find the value of x. 1. x + 2x + 3x = 180 6x = x + x + 40 = x + (x + 1) + 35 = x + 40 = 180 x = 70 3x + 36 = x = 48.
House Fire House. Can you find one or more acute angles? An acute angle is an angle with a measure of less than 90 degrees.
TRIANGLES AND TYPES OF TRIANGLES. We get a TRIANGLE by joining three non collinear points.
We may think of a point as a "dot" on a piece of paper. We identify this point with a number or a CAPITAL letter. A point has no length or width,
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°
TRIANGLES AND TYPES OF TRIANGLES. A triangle has three sides.
Geometry Triangles What is a Triangle? A three sided convex polygon. A three sided convex polygon. Its three segments are called sides. Its three segments.
BASIC GEOMETRIC ELEMENTS. POINTS AND LINES POINTS We may think of a point as a "dot" on a piece of paper. We identify this point with a number or a CAPITAL.
Scalene triangle: A scalene triangle is a triangle that has no equal sides. The following is a scalene triangle.
Chapter 1 Polygons. Bell Work What is a polygon? Give some examples.
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.
Angles-Polygons-Triangles- Quadrilaterals Angles If two lines cross we say they INTERSECT. If two lines in the same plane do not intersect, we say they.
By Mr. Dunfee Be sure to take these notes, or you will not be able to work at the computer.
Math Vocabulary 2 dimensional shapes and other geometry terms.
SPI Identify, describe and/or apply the relationships and theorems involving different types of triangles, quadrilaterals and other polygons.
A Polygon is a closed plane figure formed by line segments. open Not a polygon closed Polygon.
Types of Triangles and Quadrilaterals “I can draw and label 2-D figures.”
By Abdul Chebly. obtuse angle- an angle that’s less then 180 and higher then 90 degrees. Right angle- an angle that is 90 degrees.
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.
POLYGONS A polygon is a closed plane figure that has 3 or more sides.
Geometry Review. What is a six sided polygon called?
- Four sides - Four angles - Four vertices - The diagonals are equal in length and perpendicular and bisect each other.
Defining Triangles During this lesson, you will define triangles and their parts.
2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Vocabulary Solid Figures Lines and.
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.
The mathematical study of the properties, measurements, and relationships of points, lines, planes, surfaces, angles, and solids. Geometry.
EVERYDAYEVERYDAY. A polygon is a closed figure made by joining line segments, where each line segment intersects exactly two others. Polygon.
Geometry Review. A location in space that is just a dot. 1.Polygon 2.Point 3.Line segment 4.Triangle
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Warm Up # 4 Classify and name each angle. 1 ab c d.
POLYGONS. A polygon is a closed plane figure made up of several line segments that are joined together. The sides do not cross one another. Exactly two.
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Notes Over Classifying Polygons A polygon with three sides is a _____________. Classifying triangles by angles. Acute Triangle 3 acute angles Right.
TRIANGLES TOPIC 9 LESSON 9-5. Triangles can be classified by their sides. 3 equal sides equilateral triangle.
Possible categories: * polygons * 3 angles * 3 sides * Equilateral triangles: all sides are congruent * Scalene triangles: all sides are different.
Abner And Shae. Complementary angles: Two angles whose measures have a sum of 90 degrees. Supplementary Angles: Two angles whose measures have a sum of.
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