Question

EX.1: Point B is symmetric to A(4, -1) with respect to the bisector of the first quadrant. Then length of AB is​

Answer 1

Answer:

f point B is symmetric to A(4, -1) with respect to the bisector of the first quadrant, then B is at (-1, 4)

Length AB =√ (4--1)² + (-1-4)²

                 = √ 5² + (-5)²

                 = √ 25 + 25

                 = √50

                 = 2√5

Or 4.47

Explanation:

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