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The bottom of the trapezoid is 12 meters, 2 meters more than the top, and the height is 4 meters. How many square meters is the area of the trapezoid
Top and bottom = (12-2) △ 2 = 5m
Area = (12 + 5) × 4 × 1 / 2 = 34 square meters
The upper bottom of trapezoid is 1 / 4 meter long, the lower bottom is 2 / 3 meter long, and the height is 3 / 2 meter. How many square meters is the area of trapezoid
11 / 16 square meters
The area of a trapezoid is 32 square meters, and the sum of the top and bottom is 8 meters. How many meters is the height?
Height: 32 * 2 / 8 = 8M
In a semicircle with a diameter of 20 cm, draw a triangle with the largest area. What is the area of the triangle in square centimeter? List it
20×20÷2÷2＝100
On a rectangular piece of paper 12 cm long and 8 cm wide, cut out the two largest circles. Then what is the circumference of each circle______ The area of the rest is______ ．
According to the meaning of the title, the diameter of the largest circle is the width of the rectangle, then r = 8 △ 2 = 4 (CM), 3.14 × 8 = 25.12 (CM), r = (12-8) △ 2 = 2 (CM), 3.14 × (12-8) = 12.56 (CM), 3.14 × 42, = 3.14 × 16, = 50.24 (square cm); 3.14 × 22, = 3.14
A rectangle is 8 cm in length and 6 cm in width. Its circumference is______ Cm. Draw the largest triangle in this rectangle. The area of the three shapes is______ Square centimeter
(8 + 6) × 2, = 14 × 2, = 28 (CM), the area of the largest triangle in the rectangle is: 8 × 6 △ 2 = 24 (square cm). Answer: its perimeter is 20 cm, and the area of the three shapes is 24 square cm. So the answer is: 28, 24
How to define the algebraic value of area (such as triangle) in rectangular coordinate system? What is the formula?
At this time, the area is divided into positive and negative
Let's first introduce the formula of distance between two points in 3D, which is almost the same as that in 2D: D = sqrt ((x0-x1) ^ 2 + (y0-y1) ^ 2 + (z0-z1) ^ 2) and then introduce the cross product, the central content! The definition of cross product has: two vectors cross product to get a vector, the direction is perpendicular to the plane formed by the two vectors, the size
In Cartesian coordinates, how to get the area of a triangle?
It depends on the specific figure. Generally, there is no formula. If it is a general triangle, it should be placed in a large rectangle or regular figure to find out the large area, and then subtract the area of several triangles, so that it can be found out
Triangle area formula in space rectangular coordinate system
What is the formula for finding the area of a triangle in a coordinate system
Talk about the specific point. What's on the coordinate? The triangle on the image
RELATED INFORMATIONS
- 1. For a trapezoid, if the bottom and height remain unchanged, the area of the trapezoid will increase by 1.2 square meters if the top and bottom increase by 0.6 meters; if the top and bottom remain unchanged, the height will decrease by 0.8 meters, and the area of the trapezoid will decrease by 2 square meters?
- 2. Three points D, e and F are obtained by extending the three sides of the triangle ABC by 1, 2 and 3 times, respectively. The area of the triangle ABC is 10 square centimeters, and the formula of the triangle DEF is obtained
- 3. Java defines a rectangle, including method, perimeter and area
- 4. In triangle ABC, C is a right angle. Given AC = 2, CD = 2, CB = 3, am = BM, what is the area of triangle amn (shadow part)?
- 5. If the side lengths of ABC and def are 6,5,8 and 30,25,40 respectively, So this triangle - yes, or no - is similar to a triangle, according to-
- 6. In △ ABC and △ def, ab = De, BC = EF, and ∠ B and ∠ e complement each other
- 7. In ABC, AC = 15, BC = 13 and CD = 12, what is the area?
- 8. In the triangle ABC, AC = 13, BC = 15, height CD = 12, then its area is?
- 9. In △ ABC, ∠ C = 60 °, BC = a, AC = B, AC + BC = 8, write the functional relationship between the area s and side length a of △ ABC and the value range of independent variable a
- 10. Given the length of the three sides of a triangle, how to find the height of the triangle?
- 11. There is a trapezoid. If the upper bottom is increased by 2 meters, the lower bottom and height will not change. Its area will increase by 4.8 square meters. If the upper bottom and the lower bottom are both unchanged, and the height is increased by 2 meters, its area will increase by 8.5 square meters. Find the area of the original trapezoid
- 12. In △ ABC, ab = 10cm, BC = 16cm, ad = 6cm, AC
- 13. If both sides of a right triangle are 5 cm and 12 cm long, what is the area of the triangle? There are two cases
- 14. The bottom of a parallelogram is 11cm and its height is 4cm. How many square centimeters is the area of a triangle with the same height as its bottom?
- 15. The sum of the two right angles of an isosceles triangle is 18. What is the area? jiefen
- 16. Two cylinders of equal height, one with a base area of 25 square centimeters and a volume of 100 square centimeters, and the other with a base area of 30 square centimeters What's its volume?
- 17. The area of an isosceles triangle with a waist length of 20 cm is 140 square cm. Take any point at the bottom, The length of the vertical line from this point to the two waists is a cm and B cm respectively?
- 18. The area of an isosceles triangle is 5 square centimeters. What is the area of a circle? The diameter of the circle is equal to the bottom of the triangle, and the radius of the circle is equal to the height of the triangle
- 19. If the base length of isosceles triangle is 4 and the waist length is B, then the value range of B is ()
- 20. The length of the base is 12 cm, and the height of the isosceles triangle on the base is 8 cm___ Cm.)