Draw the largest triangle on a rectangle 8.4cm long and 5cm wide. What is the area of the triangle in square centimeters

No matter how you draw it, the area of the largest triangle is only half that of the rectangle
So the area of this triangle is 8.4 * 5 / 2 = 21 square centimeters

Cut out the largest triangle in a rectangular piece of paper 10 cm long and 7 cm wide. The area of the triangle is______ Square centimeter

A: the area of this triangle is 35 square centimeters. So the answer is: 35

Given the triangle bottom a = 20, height h = 4, calculate the area s. given the rectangle length a = 0.8, width b = 6, calculate the area s; perimeter C

Triangle area formula: 1 / 2 x bottom x height = 40
Rectangle area formula: length x width = 4.8 perimeter formula: 2x (length + width) = 13.6

RELATED INFORMATIONS

1. In the triangle ABC, a and B are its two sides, and S is the area of the triangle ABC. If s = 1 / 4 (a ^ 2 + B ^ 2), then the shape of the triangle ABC is?
2. If the side lengths a and B of the triangle ABC are two of the equations X & sup2; - 2 √ 3x + 2 = 0, and the area of the triangle ABC is √ 3 / 2, the third side C is obtained
3. The area formula of trapezoid is s = 2 / (a + b) H. if the lower base B = 25, height h = 12 and area s = 240 are known, the value of upper base a can be obtained
4. What's the formula for finding the height of the trapezoid
5. Programming for calculating perimeter and area of rectangle with VB Programming of perimeter and area of rectangle
6. Know the perimeter of the triangle is 14.13, how to calculate the area
7. Written in C # language, it is required to declare the triangle class, inherit the graphic abstract class, and calculate the perimeter and area of the triangle!
8. If the perimeter of a triangle is 12, and the three sides a, B, C have the following relations, C = B-1, B = A-1, then the area of the triangle is______ ．
9. What is the perimeter of the triangle with an area of 30 mu? Add: is any triangle, can you calculate it?
10. In Java, input the length of the three sides of the triangle from the keyboard to judge whether it forms a triangle. If it can, calculate the face of the triangle
11. What is the area of a rectangle 9 long, 7 wide and a triangle bottom 10?
12. The bottom of a triangle is fixed, its height is proportional to its area, the perimeter of a rectangle is fixed, and its length is proportional to its width
13. On a piece of rectangular paper 20 cm long and 12 cm wide, cut out the largest triangle. The bottom of the triangle is () cm, the height is () cm, and the area is () cm
14. If the base of a triangle increases by 10% and the height decreases by 10%, the area of the triangle () A. Increase by 0.5% B. decrease by 1% C. increase by 1% d. no change
15. If the height of a triangle is increased by 25%, the bottom should be () A. Decrease by 25% B, decrease by 25% C, increase by 25% Decrease by 25%, decrease by 20%, increase by 25%
16. If the height of a triangle is increased by 25%, in order to keep the area of the triangle unchanged, the bottom should be () a, reduced by 25% B, reduced by 20% and increased by 25%
17. Fill a small plastic bottle with hot water and pour out most of the water Fill a small plastic bottle with hot water, then pour out most of the water, leaving only about 3cm high water at the bottom of the bottle. Put a piece of ice on the bottle mouth and observe what happens? If you use cold water instead of hot water and do it again, what's the result? Why?
18. Triangle: known the angle between the two sides, calculate the area? Formula and formula analysis, detailed explanation emergency
19. The area of a triangle is 96 square centimeters. If the bottom and height of the triangle increase by one third, this is the area of the triangle The area of a triangle is 96 square centimeters. If the bottom and height of the triangle increase by one third, what is the area of the triangle?
20. How to calculate the bottom area of a triangle?