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A triangle with a base of 5cm and a height of 3cm is enlarged by 4:1, and the area of the figure is______ Square centimeter
[(5 × 4) × (3 × 4)] 2 = 240 △ 2, = 120 (square centimeter); so the answer is: 120
How many square centimeters is the area of a triangle with a base of 5cm and a height of 3cm enlarged by 4:1?
30 or 120
If the area of the triangle is the bottom multiplied by the height divided by two, then 3 * 5 / 2 = 7.5, quadruple magnification, 7.5 * 4 = 30 square centimeters
The bottom of a trapezoid is a centimeter, which is two times less than the top and three times higher. What is the area of this trapezoid?
Big brother and big sister, we will use it tomorrow!
The bottom is: (a + b) / 2, the height is: (A / 3), and the area is: (3a2 + AB) / 12
A2 -- the square of a
The top of a trapezoid is a centimeter, B centimeter less than the bottom, which is three times higher. The area of this trapezoid is () square centimeter
The top of a trapezoid is a centimeter, which is three times higher than the bottom. The area of this trapezoid is ((2a * a + AB) / 6) square centimeter
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