ICSE Class X Math 2015 Solved Paper

Three vertices of a parallelogram $A B C D$ taken in order are $A(3,6), B(5,10)$ and $C(3$ , 2) find:

Question : 8 of 52

Marks: +1, -0

length of diagonal BD.

Solution:

{\BD}\;={√{(5-1)^2+(10+2)^2}}

\;={√{16+144}}

\;={√{160}}

\;=4 {√{10}} \;\text " units. "\;

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