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Question Number 139114 by EnterUsername last updated on 22/Apr/21

Commented by mr W last updated on 22/Apr/21

$$i^{\prime }lltrytogiveaproofwhenihavetime.$$

Commented by EnterUsername last updated on 22/Apr/21

$$\mathrm{In}\mathrm{\Delta }\mathrm{ABC},\mathrm{origin}\mathrm{is}\mathrm{the}\mathrm{circumcenter},H\mathrm{is}\mathrm{the}\mathrm{ortho}-$$$$\mathrm{center}\mathrm{and}D\mathrm{is}\mathrm{the}\mathrm{midpoint}\mathrm{of}\mathrm{the}\mathrm{side}BC.\mathrm{If}P\mathrm{is}$$$$\mathrm{any}\mathrm{point}\mathrm{on}\mathrm{the}\mathrm{circumcircle}\mathrm{other}\mathrm{than}\mathrm{the}\mathrm{vertices}$$$$\mathrm{and}T\mathrm{is}\mathrm{the}\mathrm{midpoint}\mathrm{of}PH,\mathrm{then}\mathrm{the}\mathrm{angle}\mathrm{between}$$$$AP\mathrm{and}DT\mathrm{is}?$$

Commented by mr W last updated on 22/Apr/21

$$90°$$

Commented by EnterUsername last updated on 22/Apr/21

$$Howplease?$$

Commented by EnterUsername last updated on 23/Apr/21

$$Ok.Thanksinadvance$$

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