Dg, eg, and fg are perpendicular bisectors of the sides of △ abc . dg=5 centimeters and bd=12 centimeters.

what is cg ?

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- CG= 13 cm

Explanation:-

Given : Δ ABC where DG, EG, and FG are perpendicular bisectors of the sides intersecting at point G .

⇒ G is the circumcenter of the triangle.

⇒BG, CG and AG are the angle bisectors of the triangle.

Now, from the given figure

In ΔBDG and ΔBEG

∠D = ∠ E [right angle]

BG=BG [reflexive property]

∠DBG=∠EBG [Definition of angle bisector]

⇒ΔBDG ≅ ΔBEG [AAS congruence theorem]

Thus BD=BE= 12 cm [CPCT]

DG=EG= 5 cm [CPCT]  .....(1)

Now In ΔBGE and ΔCGE

GE=GE  [reflexive property]

∠BEG=∠CEG  [right angle]

BE=EC [Definition of perpendicular bisector]

⇒ΔBGE ≅ ΔCGE [SAS postulate]

⇒BE=CE=12 cm ......(from (1))

and GE= 5 cm

As ΔCGE is right angle then by Pythagoras theorem,

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