![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
If the hypotenuse of an isosceles right triangle is 18 cm long, how many square centimeters is its area?
According to Pythagorean theorem
18 ^ 2 / 2 = right angle side ^ 2
324/2=
162 = radical 162 = 9 radical 2 (CM)
The area is 9 pieces 2 * 9 pieces 2 / 2 = 81 (square centimeter)
The bottom of a triangle is 4.5cm long and its area is 18cm square. How high is it
18 × 2 △ 4.5 = 8 (CM)
You only need to master the area formula of triangle
If you don't know, I'll tell you: the area formula of triangle = base × height △ 2
The area of a triangle is the same as that of a circle with a circumference of 314 decimeters, and the height of the triangle is 157 decimeters
The area of a triangle is the same as that of a circle with a circumference of 314 decimeters. The height of the triangle is 157 decimeters. How many decimeters is the corresponding length of the bottom edge?
Let the radius of the circle be r, so there is 2 π r = 314 (decimeter), so r = 50 (decimeter), so the area of the circle is s = π R & # 178; = 7850 (square decimeter). Let the base of the triangle be D, so there is 157d / 2 = 7850, so d = 100 (decimeter)
RELATED INFORMATIONS
- 1. If the length of three sides of a right triangle is a positive integer and the perimeter and area are equal, the triangle is called a "perfect right triangle", and the length of three sides of a "perfect right triangle" is calculated
- 2. If you add 5cm to one side of a triangle, the area of the triangle will increase 15cm. The height of this side of the triangle is ()
- 3. The area of a triangle is 15 square centimeters, and the bottom is 10 centimeters. What is the height of the bottom
- 4. A parallelogram and a triangle have the same base and height. The sum of their areas is 15 square centimeters. The area of a parallelogram is 15 square centimeters______ Square centimeter. What's the area of the triangle______ Square centimeter
- 5. The base of the triangle is increased by 10% and the height is shortened by 10%. What percentage of the area of the triangle is now?
- 6. The area of a triangle is fixed. What's the ratio between its base and its height? What is the corresponding height
- 7. The height of a triangle is fixed, its area and the growth of its base___ Proportional relationship
- 8. As shown in the figure, the area of a trapezoid is 4 / 3 square meters, and how many square meters is the area of the shadow part A trapezoid with 5 meters at the top and 8 meters at the bottom
- 9. If the top and bottom of the trapezoid are the same as the height, and the area of the trapezoid is 60 square meters, how many square centimeters is the area of the shadow part? The waist on the left is 45 degrees, the shadow on the right is a right angled trapezoid, and the left is a right angled triangle,
- 10. The area of a triangle is 5 / 6 square meters, the height is 2 / 3 meters, and the length of the bottom edge is how many meters? It is better to have pictures in the process of writing
- 11. The area of a triangle is 18.2 square centimeters, and the length of its bottom is 10.4 centimeters. What is the height of this side
- 12. For a triangle ABC, the height AE on the bottom edge BC is 3.2 cm long. Now the bottom edge is increased by 20 cm. How many square centimeters does the area increase?
- 13. The length of the three sides of a right triangle is 3, 4 and 5 cm respectively. The height of the hypotenuse of the triangle is () cm
- 14. The difference between two right sides of a right triangle is 7cm, and the area is 30cm 2
- 15. The difference between two right sides of a right triangle is 7cm, and the area is 30cm 2
- 16. Given that the sum of the three sides of a right triangle is a + B + C = 2 and C is the hypotenuse, the maximum area of a right triangle can be obtained
- 17. How to prove that the sum of the reciprocal of the squares of the two right sides of a right triangle is equal to the reciprocal of the high square on the bottom side
- 18. If the height of the hypotenuse of a right triangle divides the hypotenuse into two parts with lengths of 4 and 9, what is the area of the right triangle? A.38B.39C.40D.41
- 19. If the ratio of the right side to the hypotenuse of a right triangle is 2:3 and the length of the hypotenuse is 20, the area of the triangle can be obtained
- 20. A square nursery covering an area of 1 hectare will be lengthened by 100 meters on each side, and the nursery area will be increased______ Hectare