Labels:black | darkness OCR: Here is an example of a tringle which has a base lengthof Stage 1 To solve this problem add the numbers in the following way upto the number 6. 1=1 1+2=3 1+2+3=6 1+2+3+4=10 1+2+3+4+5=15 1+2+3+4+5+6=21 Add all the values and you get: 1+3+6+10+15+21=56. Stage 2 If the base value is odd then take the even answers from stage 1. If the base value is even then take the odd numbers. The hole calculation can be shown in the following way: 1+2+3+4+5+6 =21 56 1+2+3+4+5 =15 1+2+3+4 =10 15- 1+2+3 =6 6 1+2 =3 + 1 1 =1 + 78 56 There is a total of 78 tringles.
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