Question
Figure A is a rectangular piece of paper measuring 19 cm by 10 cm. Jack folded the paper along the dotted line to form Figure B. What is the area of the shaded part of the paper?
4 m

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Figure A is a rectangular piece of paper measuring 19 cm by 10 cm. Jack folded the paper along the dotted line to form Figure B. What is the area of the shaded part of the paper?