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How to find the bottom of an isosceles triangle
At least one angle should be known. Otherwise, there will be many triangles
The median line on the waist of an isosceles triangle divides the circumference into 19.5cm and 16.5cm. Find the length of the waist and the bottom of the isosceles triangle
The waist is 13cm and the bottom is 10cm, or the waist is 11cm and the bottom is 14cm
If the distance between the middle point of the bottom edge of an isosceles triangle and one waist is 6, then the distance between the middle point and the other waist is?
Also 6
Verification: the distance from the middle point of the bottom edge of an isosceles triangle to the two waists is equal
It is known that: as shown in the figure, △ ABC, ab = AC, D is the midpoint of BC, de ⊥ AB in E, DF ⊥ AC in F. proof: de = DF. Prove: connect ad, ≁ AB = AC, D is the midpoint of BC, ≁ ad is the bisector of ∠ BAC (the property of three lines in one), and ≁ de ⊥ AB, DF ⊥ AC, ≁ de = DF (the point on the bisector is equal to both sides of the angle)
RELATED INFORMATIONS
- 1. An isosceles triangle has two sides, 5cm and 6cm. The perimeter of the triangle is 5cm______ Cm or______ cm．
- 2. The circumference of isosceles triangle is 30cm, one side is 12cm, and the other side is 12cm______ ．
- 3. Draw the largest square in a circle, only tell the square area is 14 square meters, find the area of the circle
- 4. In the figure below, it is known that the area of a square is 40 square centimeters, so how many square centimeters is the area of a circle in the figure
- 5. Divide a circle into several equal parts, cut it and put it together into an approximate rectangle. The area of the shadow is known to be 9.42 square centimeter. What is the area of the circle
- 6. As shown in the figure, the area of the circle is 21.98 square centimeters, so how many square centimeters is the area of the square?
- 7. The sum of the radii of the two circles is 12cm. The diameter of the small circle is 10cm. What is the area of the big circle?
- 8. The sum of the areas of two circles with a diameter of 10 cm is equal to that of a circle with a diameter of 20 cm______ ．
- 9. The radius of a circle increases from 5 cm to 8 cm, and the area of the circle increases by () square cm A. 3B. 39C. 39ПD. 40П
- 10. Fold a circular piece of paper with a diameter of 8 cm in half to get a semicircle. The area of the circle is
- 11. The circumference of isosceles triangle is 28.5cm, whose height is 6.4cm, and what is its area
- 12. Draw an isosceles trapezoid so that its top and bottom edges are 5cm and 11cm in length and 4cm in height, and calculate the perimeter of the isosceles trapezoid Just started school not long, geometry, do not make what square root what thing Pythagorean theorem has not been learned yet
- 13. The length of the base of an isosceles triangle is 5cm, and the middle line of a waist is divided into two parts. The difference between the two parts is 2cm A. 7cm b.3cm c.7cmor3cm D
- 14. Pythagorean theorem: the perimeter of an isosceles triangle is sixteen, and the height of its bottom is four
- 15. The perimeter of the triangle is 22cm. The first side is known to be (a + 2b) cm, and the second side is (B + 2) cm longer than the first side. The third side of the triangle is calculated
- 16. If the two sides of a triangle are 5 cm and 8 cm respectively, the length of the third side may be () cm A. 12 cm B. 13 cm C. 14 cm
- 17. The perimeter of a rectangle is 50cm. The length of the rectangle is 50% more than the width. How about the area of the rectangle? Be sure to say why? Step by step
- 18. A cuboid is 10cm long, 7cm wide and 5cm high. The sum of its edges is (), the surface area is (), and the volume is ()
- 19. As shown in the figure, Xiao Hong cuts a 4 cm wide strip from a square, and then cuts a 5 cm wide strip from the remaining rectangular paper along the direction parallel to the short side. If the area of the strips cut twice is exactly the same, what is the area of each strip? What is the area of the original square?
- 20. As shown in the figure, Xiao Hong cuts a 4 cm wide strip from a square, and then cuts a 5 cm wide strip from the remaining rectangular paper along the direction parallel to the short side. If the area of the strips cut twice is exactly the same, what is the area of each strip? What is the area of the original square?