ICSE Class X Math 2013 Solved Paper

Using graph paper, plot the points $A(6,4)$ and $B(0,4)$ .

Question : 19 of 46

Marks: +1, -0

Find its perimeter.

Solution:

From the graph,

{\AB}=6 {\cm}, {\BB}^{'}=8

{\cm}

.

In

△ {\ABB}^{'}

( {\AB}^{'}) ^2\;= {\AB}^2+ ( {\BB}^{'}) ^2

\;=(6)^2+(8)^2=36+64=100

{\AB}^{'}\;=10= {\A}^{'} {\B}

(

{\ABA}^{'} {\B}^{'}

is a parallelogram)

\;\text " Perimeter of "\; {\AB}^{'} {\B}^{'}\;= {\A}^{'} {\B}^{'}+ {\AB}^{'}

+ {\AB}+ {\A}^{'} {\B}

\;=6+10+6+10

\;=32 \;\text " units. "\;

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