1.

An isosceles triangle is constructed as shown in the figure. Which of the given statements in incorrect?

A.  \[\overline{PR}\] is the hypotenuse of \[\Delta PQR\].
B.  \[\Delta PQR\] is an equilateral triangle.
C.  \[\Delta PQR\] is a right angled triangle.
D.  In right angled \[\Delta PQR\], its equal angles measure as \[90{}^\circ ,45{}^\circ ,45{}^\circ .\]
Answer» C.  \[\Delta PQR\] is a right angled triangle.


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