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Draw a straight line AB of length 8cm. Draw the locus of all points which are equidistant from A and B. Prove your statement.

Locus

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Answer

We know that locus of point equidistant from two points is the perpendicular bisector of the line segment joining them.

From figure,

Draw a straight line AB of length 8cm. Draw the locus of all points which are equidistant from A and B. Prove your statement. Locus, ML Aggarwal Understanding Mathematics Solutions ICSE Class 10.

CD is the locus of all points which are equidistant from A and B.

Proof :

Consider △GOA and △GOB.

∠GOA = ∠GOB (Both are equal to 90°)

OG = OG (Common side)

AO = OB (They are equal as CD bisects AB at O).

Hence, by SAS axiom △GOA ~ △GOB.

Since triangles are similar, hence the ratio of their corresponding sides are equal.

AGOG=BGOGAG=BCOG×OGAG=BG.\therefore \dfrac{AG}{OG} = \dfrac{BG}{OG} \\[1em] \Rightarrow AG = \dfrac{BC}{OG} \times OG \\[1em] \Rightarrow AG = BG.

Hence, proved that AG = BG. Thus proved that any point on CD is equidistant from A and B.

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