1.

In a right angled triangle the square of the hypotenuse is twice the product of the square of the other sides. Then the triangle is

A. equilateral       
B. isosceles  
C. \[\text{of }\angle s\,\,30{}^\circ ,\text{ 6}0{}^\circ ,\,\,90{}^\circ \]
D. \[\text{of }\angle s\,\,40{}^\circ ,\text{ }50{}^\circ ,\,\,90{}^\circ \]
Answer» C. \[\text{of }\angle s\,\,30{}^\circ ,\text{ 6}0{}^\circ ,\,\,90{}^\circ \]


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