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Freelsaustin200
 Its a RIGHT ANGLED TRIANGLE. 

GIVEN: 
hypo=25 
opposite and adjacent=15 and 20. 

FORMULA: 
hypotenuse^2 =opposite side^2 + adjacent side^2 
25^2=15^2+20^2 
625=225+400 
400+225=625 

so its a right angled triangle.................... 

understand??
25^2 = 20^2 + 15^2
625 = 400 + 225
625 = 625

It's a right triangle.

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