Trying Triangles By Jan, Marcia, Carole, and Donna Adapted By Suzanne & Stephanie.
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Transcript of Trying Triangles By Jan, Marcia, Carole, and Donna Adapted By Suzanne & Stephanie.
![Page 1: Trying Triangles By Jan, Marcia, Carole, and Donna Adapted By Suzanne & Stephanie.](https://reader030.fdocuments.in/reader030/viewer/2022032605/56649e745503460f94b73f79/html5/thumbnails/1.jpg)
Trying TrianglesTrying TrianglesTrying TrianglesTrying TrianglesByBy
Jan, Marcia, Carole, and DonnaJan, Marcia, Carole, and DonnaAdapted ByAdapted By
Suzanne & StephanieSuzanne & Stephanie
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Can You Answer These Questions?
• Tell me what a triangle looks like.
• How many sides does every triangle have? Would you count the sides of this triangles for me?
• How are the triangles like the other objects? How are
they different? • Would you count the number of sides on some of the
shapes around the room for me so we can see if they are triangles?
• Do you know the types of triangles?
• Do you know the types of angles that they have?
![Page 3: Trying Triangles By Jan, Marcia, Carole, and Donna Adapted By Suzanne & Stephanie.](https://reader030.fdocuments.in/reader030/viewer/2022032605/56649e745503460f94b73f79/html5/thumbnails/3.jpg)
Triangle• A triangle is one of the basic
shapes of geometry.
• A two-dimensional figure with three vertices and three sides which are straight line segments.
![Page 4: Trying Triangles By Jan, Marcia, Carole, and Donna Adapted By Suzanne & Stephanie.](https://reader030.fdocuments.in/reader030/viewer/2022032605/56649e745503460f94b73f79/html5/thumbnails/4.jpg)
Types of Triangles
GET READY!!!!!
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• Two sides are of equal length and they have two equal angles.
Isosceles Triangle
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• all sides have different lengths and all angles are different.
Scalene Triangle
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Equilateral Triangle• Three sides have equal length and
three angles of equal size (which are all 60 degrees.)
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Right Angle• Right Triangles (right-angled triangles)
have one right angle (equal to 90°).
It is possible to have a right isosceles triangle - a triangle with a right angle and two equal sides.
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Acute Angel• Acute triangles have all acute angles (angles
less than 90°).
It is possible to have an acute triangle which is also an isosceles triangle - these are called acute isosceles triangles.
![Page 10: Trying Triangles By Jan, Marcia, Carole, and Donna Adapted By Suzanne & Stephanie.](https://reader030.fdocuments.in/reader030/viewer/2022032605/56649e745503460f94b73f79/html5/thumbnails/10.jpg)
Obtuse Angle• Obtuse triangles have one obtuse angle
(angle which is greater than 90°).
It is possible to have a obtuse isosceles triangle - a triangle with an obtuse angle and two equal sides.
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Tricky Triangles • How many triangles are
in this drawing?
• Name the different types of triangles you find.
• How many of each type of triangle can you find?
http://nrich.maths.org/public/viewer.php?obj_id=1025&part=index&refpage=leg.php
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Find the Triangles
• How many triangles are in this drawing?
• You might have to draw the shape many
times and mark each triangle you find. http://nrich.maths.org/public/viewer.php?obj_id=928&part=index&refpage=leg.php
• Look very carefully!
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Heptagon Triangles • How many
different triangles can you find in this shape?
http://nrich.maths.org/public/viewer.php?obj_id=195&part=index&refpage=leg.php
![Page 14: Trying Triangles By Jan, Marcia, Carole, and Donna Adapted By Suzanne & Stephanie.](https://reader030.fdocuments.in/reader030/viewer/2022032605/56649e745503460f94b73f79/html5/thumbnails/14.jpg)
Hiding Triangles
• How many triangles can you find?
• Look very carefully, some are hiding!
http://nrich.maths.org/public/viewer.php?obj_id=138&part=index&refpage=leg.php
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THE TRIANGLE SONG
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Additional Website Activities
• http://nrich.maths.org/public/viewer.php?obj_id=967&part=index&refpage=leg.php
• http://nrich.maths.org/public/viewer.php?obj_id=2124&part=index&refpage=leg.php
• http://nrich.maths.org/public/viewer.php?obj_id=2852&part=index&refpage=leg.php
![Page 17: Trying Triangles By Jan, Marcia, Carole, and Donna Adapted By Suzanne & Stephanie.](https://reader030.fdocuments.in/reader030/viewer/2022032605/56649e745503460f94b73f79/html5/thumbnails/17.jpg)
Good job!!!