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GeoGebra Lesson
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GeoGebra Lesson
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Copy of Copy of Triangular Numbers
Author:
ayu sururi mardiah
,
Gareth Daniels
,
Edmond So
Use the input box to choose a value for
n
.
GeoGebra
Try to work out a formula to find the number of red circles in the
n
th pattern.
GeoGebra
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