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It is known that the waist length of an isosceles triangle is 3 / 4 of the length of its base, and the length of one side is 11cm, then its circumference is_____________ .
The length of one side is 11, if it is waist
X is the length of the bottom edge
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If the waist length of an isosceles triangle is 43 times the length of its bottom and the length of one side is 11 cm, then its circumference is______ ．
(1) If the waist length is 11cm, then the base length is 11 × 34 = 334cm, then its perimeter is 11 + 11 + 334 = 1214cm; (2) if the base length is 11cm, then the waist length is 11 × 43 = 443cm, then its perimeter is 11 + 443 + 443 = 1213cm; so its perimeter is 1214cm or 1213cm
Isosceles triangle. The middle line of a waist divides the circumference of the triangle into two parts: 13.5cm and 11.5cm. Find the three sides of the isosceles triangle
Let one waist be 2x,
The first answer is 3x = 11.5 x = 23 / 6, that is, the waist length is 46 / 6 cm,
The length of the bottom edge is 58 / 6 cm
The second answer is 3x = 13.5 x = 4.5, the waist length is 9cm, the bottom edge is 7cm
The center line on the waist of an isosceles triangle divides the circumference of the triangle into two parts, cm and 15cm, and calculates the lengths of each side of the triangle
The first case: 4cm, 4cm, 11cm
The second case: 5cm, 5cm, 7cm
The perimeter is 17cm
It is known that in the isosceles triangle ABC, the center line BD on a waist AC divides the circumference of the triangle into two parts 9cm and 15cm, and calculates the waist length and the bottom length of the triangle
Let the waist length be X. when the waist length and half of the waist length are 9cm, x + 12x = 9, the solution is x = 6, so the bottom edge = 15-12 × 6 = 12, ∵ 6 + 6 = 12, ∵ 6cm, 6cm, 12cm cannot form a triangle. When the waist length and half of the waist length are 15cm, x + 12x = 15, the solution is x = 10, so the bottom edge = 9-12 × 10 = 4, so
Given the center line of the waist of an isosceles triangle, divide the circumference of the triangle into two parts, 9cm and 15cm respectively, and calculate the length of the waist and the bottom of the triangle
Suppose the waist length of an isosceles triangle is 2xcm
2X + x = 3x = 9cm, the length of the bottom is 15cm - xcm
perhaps
2X + x = 15 cm, the bottom edge is 9 cm - x cm
If this is the first case
Then the waist length is 6 cm and the bottom length is 12 cm, which can not form a triangle and can not be discarded;
If it is the second case
The waist length is 10 cm and the bottom edge is 4 cm, which meets the requirements
It is known that in the isosceles triangle ABC, the center line BD on a waist AC divides the circumference of the triangle into two parts 9cm and 15cm, and calculates the waist length and the bottom length of the triangle
Let the waist length be X. when the waist length and half of the waist length are 9cm, x + 12x = 9, the solution is x = 6, so the bottom edge = 15-12 × 6 = 12, ∵ 6 + 6 = 12, ∵ 6cm, 6cm, 12cm can not form a triangle. When the waist length and half of the waist length are 15cm, x + 12x = 15, the solution is x = 10, so the bottom edge = 9-12 × 10 = 4, so the three sides of the triangle are 10cm, 10cm, 4cm, which can form a triangle The waist length of the horn is 10 cm and the bottom edge is 4 cm
The circumference of an isosceles triangle is 30cm, and the length of the bottom is two-thirds of the waist length of one side
Circumference = base + waist length * 2 = waist length * 2 / 3 + waist length * 2 = waist length * 8 / 3
therefore
Waist length = circumference * 3 / 8 = 30 * 3 / 8 = 45 / 4cm
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If the acute angle between the heights of the two waists of an isosceles triangle is 70 degrees, then the degrees of the three internal angles of an isosceles triangle are
(1) The acute angle between the heights of the two waists of an isosceles triangle is 70 degrees
Then the top angle is 110 degrees and the two bottom angles are (180-110) △ 2 = 35 degrees
110,35,35
(2) The acute angle between the heights of the two waists of an isosceles triangle is 70 degrees
The obtuse angle is 110 degrees, the apex angle is 70 degrees, and the two base angles are 110 △ 2 = 55 degrees
70,55,55
If an angle of an isosceles triangle is 92 ℃, what is the angle between the height of the waist and the bottom?
180-(180-92)/2-90 =46
RELATED INFORMATIONS
- 1. If the vertex angle of an isosceles triangle is known to be 40 degrees, then the angle between the height of its waist and the bottom is 40 degrees______ ．
- 2. If the acute angle between the heights of the two waists of an isosceles triangle is 70 degrees, what are the degrees of the three internal angles of an isosceles triangle?
- 3. In ABC, ab = 7, AC = 5, BC = 3, find SINB, CoSb
- 4. It is known that △ ABC is an isosceles triangle, BD is high, and ∠ abd = 50 degrees It's a process
- 5. As shown in the figure, take the hypotenuse of the isosceles right triangle AOB as the right edge, make the second isosceles right triangle aba1 outward, and then use the isosceles right triangle a1bb1 Given OA = ob = 1, what is the area of the nth isosceles right triangle?
- 6. An isosceles right triangle, known hypotenuse is 9 cm. Seek side length. What is the formula?
- 7. If the base length of an isosceles triangle is 12cm and the waist length is 10cm, the height of the belt is? To be explained in detail
- 8. In the triangle ABC, the angle BAC = 60 degrees, CD = 21, BC = 31, BD = 20, find ad
- 9. In the triangle ABC, if AC = 5, BC = 13, CD = 12, then the area of △ ABC is So hard!
- 10. As shown in the figure, in the triangle ABC, ab = AC = 10, s triangle ABC = 30, find the length of BC
- 11. An isosceles triangle, in which the length of two sides are 5 / 3 decimeter and 4 / 1 decimeter respectively, calculate the perimeter
- 12. The ratio of the length of a waist to the length of the bottom of an isosceles triangle is 4:3. The circumference of the triangle is 528 cm. How many cm is the length of the bottom
- 13. The circumference of an isosceles triangle is 160cm. The ratio of the waist length to the bottom length is 3:2. What is the waist length and the bottom length of this triangle
- 14. An isosceles triangle, one side is 30 cm long, the other side is 65 cm long, the triangle circumference is 30 cm
- 15. The circumference of an isosceles triangle is 32cm. The length of the waist is 3 times longer than that of the bottom, which is 6cm more than that of the bottom. Find the length of each side
- 16. Be sure to see a reward. Pick up an isosceles triangle with a waist length of 10cm on a rectangular cardboard with a length of 17cm and a width of 16cm Very important, please answer with conscience! (one vertex of triangle and one vertex of rectangle are required to coincide, and the other two vertices are on the side length of rectangle). Please draw a figure or use words to show the detailed drawing process and find the method of drawing acute angle
- 17. It is known that the length of the base and the waist of an isosceles triangle are 6 and 5, respectively
- 18. The girth of an isosceles triangle is 16cm, the height of its bottom is 4cm
- 19. Let the length of one side of a triangle with an area of 12 square centimeters be a (?) and the height of this side be h (?). (1) find the analytic expression of the function of H with respect to a and the independent variable a Value range; (2) Is the function of H about a an inverse scale function? If so, please state its scale coefficient; (3) If the area of the triangle is changed to a fixed value s (square centimeter), and the rest is unchanged, find the analytic function of H with respect to a Solution
- 20. Draw a triangle with the largest area in a rectangle. The area ratio of the triangle to the rectangle is ()