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How many triangles?
Click the yellow button to find out.
Topics: Starter  Problem Solving  Shape
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Previous Day  This starter is for 23 September  Next Day
27
The important thing is not the answer but the method you used to arrive at the answer. Did you have a structured approach? Were you sure that you had the right answer?
Here is a printable worksheet.
Can you make up a puzzle like this for others to solve?
Extension Challenge
How many triangles are on the front of this hotel reception desk?
Other shape counting starters:
How Many Squares 1?
 How Many Squares 2?
How Many Triangles 1?

How Many Triangles 2?  How Many Triangles 3?
How Many Rectangles?
 Rectangles Investigation 
Icosahedron
Teacher, do your students have
access to computers? 

Here is the URL for a concise version of this page without comments or answers.
Transum.org/go/?Start=September23
Here is the URL which will take
them to a student version of this activity.