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A rectangle 15 cm long and 9 cm wide is reduced by 1:3, and the area of the figure is______ Square centimeter
(15 / 3) × (9 / 3), = 5 × 3, = 15 (square centimeter); answer: the area of the figure is 15 square centimeter
The area of a triangle is 28.4 square centimeters. If the height is reduced to 1 / 4 of the original, how many square centimeters is its area
The area of a triangle is 28.4 square centimeters. If the height is reduced to 1 / 4 of the original, how many square centimeters is its area
Area = bottom × height △ 2
Now the height is reduced by a quarter
Then the area will be 1 / 4 of the original
So the answer is 28.4 △ 4 = 7.1 square centimeter
If a trapezoid is reduced by 4cm, it becomes a triangle, and its area is reduced by 8cm. If the trapezoid is increased by 4cm, it becomes a parallel quadrangle
Trapezoid bottom = 4cm, trapezoid height = 8 ／ 1 / 2 ／ 4 = 4cm, trapezoid bottom = 4 + 4 = 8cm, trapezoid area = 1 / 2 × (4 + 8) × 4 = 24cm, hope to help you, please accept in time, your adoption is the power of my answer!
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