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Question Number 13228 by b.e.h.i.8.3.4.1.7@gmail.com last updated on 16/May/17

Commented by b.e.h.i.8.3.4.1.7@gmail.com last updated on 16/May/17

$$intriangleABC,showthat:$$$$\mathit{r}=\sqrt{{\mathit{r}}_{\mathit{a}}.{\mathit{r}}_{\mathit{b}}}+\sqrt{{\mathit{r}}_{\mathit{b}}.{\mathit{r}}_{\mathit{c}}}+\sqrt{{\mathit{r}}_{\mathit{c}}.{\mathit{r}}_{\mathit{a}}}.$$

Commented by Tinkutara last updated on 17/May/17

$$\mathrm{Can}\mathrm{you}\mathrm{tell}\mathrm{the}\mathrm{source}\mathrm{of}\mathrm{this}\mathrm{question}?$$

Commented by chux last updated on 17/May/17

$$\mathrm{pls}\mathrm{sir}....\mathrm{which}\mathrm{app}\mathrm{did}\mathrm{you}\mathrm{use}$$$$\mathrm{in}\mathrm{drawing}\mathrm{this}$$

Commented by Tinkutara last updated on 17/May/17

$$\mathrm{You}\mathrm{can}\mathrm{use}\mathrm{Geogebra}\mathrm{Graphing}$$$$\mathrm{Calculator}.$$

Commented by chux last updated on 17/May/17

$$\mathrm{ok}......\mathrm{thanx}$$

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