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GeoGebraGeoGebra Classroom

1.08 Day 1 Classify Triangles

Use the POLYGON TOOL to create a triangle. Use the ANGLE tool to measure the angles.

Move points A, B, and C to make an acute triangle. How many acute angles does your triangle have? Do you think this is true for all acute triangles?

Move points A, B, and C to make an obtuse triangle. How many obtuse angles does your triangle have? Could you make a triangle with more than one obtuse angle?

Move points A, B, and C to make a right triangle. How many 90° angles does your triangle have? Could you make a triangle with more than one 90° angle?