Question

a quadrilaterl in which all four side are equal and measure of all angle 90 is rectangle (true/false)​

Answer 1

Yes, it is true.

The basic criteria for any quadrilateral to become a rectangle is that,

1. it must be a Parallelogram, &
2. one of the angle is 90°.

Since opposite angles are same (90°), then it is automatically a parallelogram.

Answer 2

$\huge \tt \pink{true}$