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The three sides of a right triangle are 12 cm, 16 cm and 20 cm respectively
The area of a right triangle is half of the product of the lengths of two right angles, and half of the product of the length of the hypotenuse and the height of the hypotenuse
Therefore, the height on the bevel = 12 × 16 △ 20 = 9.6 (CM)
A right triangle, the length of three sides is 12 cm, 13 cm, 5 cm, its area is______ Square centimeter
Area of triangle:
12×5÷2
=60÷2
=30 (square centimeter)
A: the area of this triangle is 30 square centimeters
So the answer is: 30
The length of the hypotenuse of a right triangle is 10 decimeters, the length of the two right sides is 6 and 8 decimeters, and the height on the hypotenuse is () decimeters Unit 5 test in the first semester of grade 5
Area bridge is used in this problem
It can be seen from the title that this is a right triangle. Two right angles can be used as a set of bases and heights
If the length of the height perpendicular to the inclined side is x, then the area bridge can be used
6*8=10*x. x=4.8
The height on the bevel is 4.8 decimeters
The ratio of the three sides of a right triangle is 5:12:13, and the total side length is 6 decimeters. How many square meters is its area? Formula I want a formula!
Because the ratio is 5:12:13, let the bevel side be 13X, and the two right angle sides are 5x and 12x. Because the total side length is 6 decimeters, there is 5x + 12x + 13X = 6 x = 0.2
Its area is 1 / 2 * 5x * 12x = 0.5 * 1 * 2.4 = 1.2 square decimeter
I don't know if the answer is detailed`
For a right triangle, the length of one right angle side is 3.6 decimeters, which is three times the length of the other right angle side. Find out the area of this right triangle
Area of right triangle = two
Product of right angle sides
therefore
The other right angle side is 3.6 △ 3 = 1.2 decimeter
Area 3.6 * 1.2 △ 2 = 2.16 square decimeters
For a right triangle, the length of one right angle side is 6 decimeters, which is 3 times the length of the other right angle side? A triangular piece of glass, the bottom length is 40 decimeters, the height is How much is the area of this glass? If 1 yuan can buy 5 square decimeters of glass, how much does it cost to buy this glass?
Area of right triangle = right side * other right angle side / 2
The other right angle side = 6 / 3 = 2 decimeters
The area of the triangle is 6 * 2 / 2 = 6 square decimeters
High base area formula
40 * 15 / 2 = 300 square decimeter
300 / 5 = 60 yuan
It seems that someone has worked out a 120 yuan just now. You can't fool children like this
The right angle side of a right triangle is 1 decimeter longer than the other right angle side, and the oblique side is 5 decimeters long with the root sign. How long are the two right sides
Let the long side be x and the short side y
X-Y=1
X²+Y²=5
（X-Y）²=x²-2xy+y²=1
xy=2
(x+y)²=9
x+y=3
x-y=1
x=2 y=1
A piece of rectangular paper with a length of 12 decimeters and a width of 7.5 decimeters can be cut into () right triangles with two right angles of 4 and 3 decimeters respectively A. 15 B. 14 C. 12 D. 7
According to the stem analysis, we can get the following conclusions
12 △ 4 = 3,
7.5 ÷ 3 ≈ 2 (PCs.),
So 3 × 2 × 2 = 12,
A: you can cut up to 12 of these right triangles
Therefore, C
A piece of rectangular paper with a length of 12 decimeters and a width of 7.5 decimeters can be cut into at most () right triangles with right angles of 4 and 3 decimeters respectively
According to the stem analysis, we can get the following conclusions
12 △ 4 = 3
12 △ 3 = 4
4 + 3 = 7
So 7 × 2 = 14
A: up to 14 such right triangles can be cut out
Cut a piece of rectangular colored paper with a length of 12 decimeters and a width of 6 decimeters into right triangles with right angles of 2 and 3 decimeters respectively. At most, several sides can be made There is also one question: if it is a rectangular colored paper with a length of 13 decimeters and a width of 6 decimeters, how many sides of the small flag can be made at most
1、
It is (12 ￣ 2) × (6 ￣ 3) × 2 = 24 sides
2、
The quotient of 13 ￣ 2 is 6
6×（6÷3)×2=12
So it's still 12 sides
RELATED INFORMATIONS
- 1. How many isosceles right triangles can be cut from a rectangular paper with a length of 5 decimeters and a width of 2 decimeters? In my son's homework, I divide the area of a rectangle by the area of a triangle to get 125. But the answer is no, it's 120. Obviously, it's wrong to divide the area by the area, I thought for a while, the answer is right, but I don't know how to use the formula. I think that the width of 2 decimeters = 20cm, except the side length of the triangle 4cm can be divided, the width can get the side length of five triangles, but when 50 cm is divided by 4 cm, the length of the rectangle can not be fully used
- 2. Proof: in a right triangle, if a right angle side is equal to half of the hypotenuse, then the acute angle of the right angle is equal to 30 °
- 3. It is known that the sum of the two right sides of a right triangle is 2. Find the minimum length of the hypotenuse and the length of the two right angles when the length of the oblique side reaches the minimum
- 4. Is there any way to calculate the value of special angle function? What degree is cos 82.8; Cos 42.3; Cos 0.725; Cos 0.9086?
- 5. In the right triangle ABC, given the right angle side a = root 96, hypotenuse C = root 150, calculate the circumference of the triangle ABC, 18 times 2
- 6. A right triangle. The length of the side opposite the right angle is 10 cm, and the other two sides are 8 cm and 6 cm respectively______ Centimeter
- 7. It is known that the ratio of the hypotenuse of a right triangle to one right angle side is 17:8, and the length of the other right angle side is 60
- 8. It is known that the sides to which △ ABC, ∠ a, ∠ B and ∠ C are respectively a, B, C and a: B: C = 13:12:5, is △ ABC a right triangle? Why? Understanding with Pythagorean
- 9. It is known that the circumference of RT △ ABC is 4 + 2 3, the length of hypotenuse AB is 2 3. Find the area of RT △ ABC
- 10. If the three sides of a right triangle are three consecutive even numbers, and the area is 24, then the three sides of the triangle are respectively pro,
- 11. If the ratio of the two right sides of a right triangle is 3:4 and the length of the hypotenuse is 25, then the height of the hypotenuse is______ .
- 12. Let a and B be the two right sides of a right triangle. If the circumference of the triangle is 6 and the length of the hypotenuse is 2.5, then the value of AB is () A. 1.5 B. 2 C. 2.5 D. 3
- 13. If the ratio of the two right sides of a right triangle is 3:4 and the length of the hypotenuse is 20, then its area is______ .
- 14. Consult: the oblique side of a right triangle is 15 cm long, and the sum of right angles is 20 cm. Find its area
- 15. One acute angle of a right triangle is 55 ° and the other acute angle is______ °．
- 16. The ratio of one right angle side to the hypotenuse of a right triangle is 12:13, and the length of the other right angle side is 5cm. What is the area of this right triangle?
- 17. Given that the angle between the hypotenuse and the base of a right triangle is 60 degrees and the height is 1.8 meters, what is the length of the bottom edge?
- 18. The angle between the hypotenuse and the base of a right triangle is 30 degrees. The length of the hypotenuse is 1.7 meters. How to find the length of the bottom edge?
- 19. An acute angle of a right triangle is 36 degrees. Find another acute angle
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