One way to engage students in a geometry challenge is to display a triangle and ask them to identify its properties. For example, you could ask them to determine the angles of the triangle, the lengths of its sides, and whether it is a right, acute, or obtuse triangle.
Once students have identified the properties of the triangle, you can challenge them to draw different shapes with similar properties. For example, you could ask them to draw a different triangle with the same angles but different side lengths, or a triangle with the same side lengths but different angles.
After students have completed the challenge, you can facilitate a discussion about the relationships between the different shapes. For example, you could ask students to explain how changing the side lengths affects the angles of the triangle, or how changing the angles affects the side lengths. This can help students deepen their understanding of geometric properties and relationships.
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