Draw a triangle with an area of 10 square centimeters

Draw a triangle with an area of 10 square centimeters

Triangle area = base times height divided by 2, only find two numbers multiplied, and then divided by 2 to get 10, use one of the numbers as the base, the other as the height
If you don't need to draw any triangle, it's easier to draw a right triangle. Take two data as the two right sides of a right triangle
Simpler algorithm: 10x2 = 20, find which two numbers multiply to get 20

The bottom of a triangle is expanded 6 times and the height is expanded 4 times. The area is 196 square centimeters. What is the area of the original triangle

The area is expanded 6 × 4 = 24 times
The area of the original triangle = 196 △ 24 = 49 / 6 square centimeter

The area of a triangle is 14.4 square centimeters, the area of a parallelogram is equal to it, its bottom is 3.6 centimeters, and the corresponding height is several centimeters

The area of a parallelogram is equal to the base times the height
h＝14.4/3.6
H = 4 cm