50 PTS! SUPER EASY 9TH GRADE GEO
- FIND THE AREA
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half the diagonal is shown as 20cm.
The full diagonal would be 20 x 2 = 40 cm.
area of a square using the diagonal is 1/2 x diagonal^2
Area = 1/2 x 40^2 = 800 square cm
answer: 800 square cm.