The diagram shows two straight lines, $ABCD$ and $AEFGHIJ$, which intersect at $A$. Triangles

Question

The diagram shows two straight lines, $ABCD$ and $AEFGHIJ$, which intersect at $A$. Triangles are to be drawn using three points $A$, $B$, $C$, $D$, $E$, $F$, $G$, $H$, $I$, $J$ as it vertices. How many different triangles can be drawn which have the point $A$ as one of the vertices? [1] How many different triangles in total can be drawn? [4]

Accepted Answer

(i) 18; (ii) 81

N2007 P1 Q4 (AM 9233)

N2007 P1 Q4 (AM 9233)

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