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The bottom of the triangle is 10 cm, and its area is 80 cm 2. If its area is reduced by 20 cm, how many cm should the bottom be compressed?
The height of the triangle can be calculated from the area and bottom edge of the triangle, and then the length of the compressed bottom edge can be calculated from the reduced area and the calculated height. Finally, the number of centimeters of the bottom should be compressed by subtracting the compressed bottom length with the original bottom side length
Height = 80 * 2 / 10 = 16 bottom edge length after compression = 60 * 2 / 16 = 7.5 bottom compression = 10-7.5 = 2.5
The base of a triangle is 10 cm, and its area is 80 cm 2. If the height of the triangle remains unchanged and the area is reduced by 20 cm, how much should the bottom be shortened By arithmetic,
80*2/10=16CM
The height is 16 cm, and the area is 20 less
Then 60 * 2 / 16 = 7.5cm
10-7.5=2.5CM
It can be reduced by 2.5
The bottom of a triangle is 10 cm, and its area is 80 cm 2. In order to keep its height unchanged and reduce its area by 20 cm, how many cm should the bottom be shortened? Whoever answers first will adopt
The height = 80 * 2 / 10 = 16, the area reduced by 20 is 60 = 16 * x / 2, x = 7.5, that is, the bottom should be shortened by 2.5cm
The bottom of the triangle is 10 cm, and its area is 80 cm 2. To reduce its area by 20 cm, how many cm should the bottom be shortened?
By: S = 1 / 2 * a * h
h=80*2/10=16
The base is shortened by x cm
Reduced area: S = 1 / 2 * x * 16 = 20
x=2.5
In order to reduce the area by 20 square centimeter, the base should be shortened by () cm
Height = 80 × 2 △ 10 = 16 cm
Reduce the area by 20, and now the area is 80-20 = 60 square centimeters
Bottom = 60 × 2 △ 16 = 7.5cm
So the bottom should be shortened by 10-7.5 = 2.5cm
A: the bottom should be shortened by 2.5 cm
The area of a parallelogram is 36 square centimeters, and the area of the triangle with its equal base and height is______ Square centimeter
36 △ 2 = 18 (square centimeter)
A: the area of the triangle is 18 square centimeters
So the answer is: 18
The area of a triangle is 36 square centimeters, the height is 12 centimeters, and the bottom is () centimeters
36 × 2 △ 12 = 6 (CM)
The area of a triangle is 36 square centimeters, the height is 10 centimeters, what is the bottom?
Base times height divided by 2 = area of triangle
36 times 2 divided by 10 = bottom = 1.8 cm
The area of a triangle is 72 square centimeters, the bottom is 36 centimeters, and how many centimeters is the height
72x2 divided by 36 is 4
A triangle has an area of 48 square centimeters, a base area of 12 centimeters and a height of several centimeters
Let the height be X
12*x/2=48
12x=96
x=8cm
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