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Sagot :
Answer:
Area of octagon = 100 - 2 = 98 cm²
Step-by-step explanation:
Area of octagon = area of square - area of 4 triangles that are formed in four corners
Area of square:
Side = Width of the octagon = 10 cm
Area = side * side
= 10 * 10
= 100 cm²
Area of triangle:
Base = 2cm
height = 2 cm
Area =
=
= 2 cm²
Area of octagon = 100 - 2 = 98 cm²
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