Select all appropriate RECTANGLE properties * Opposite angles are congruent
Opposite angles are supplementary
Diagonals are congruent
Diagonals bisect opposite angles
Opposite sides are parallel
Diagonals are perpendicular

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Ответ:

victoriahuntley12148

27.11.2021

Mathematics

Step-by-step explanation:

$\frac{39+40+40+41+41+41+41+41+43+x}{10} =42$

$\frac{367+x}{10} =42$

367+x=420

x=420-367=53

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Select all appropriate RECTANGLE properties * Opposite angles are congruent Opposite angles are supplementary Diagonals are congruent Diagonals bisect opposite angles Opposite sides are parallel Diagonals are perpendicular