Extend the line segment Ba to the point C, make BC = 3ba, take the midpoint D of BC, know ad = 2cm (as shown in the figure), and calculate the length of BC···

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• 1. Extend the segment Ba to the point C, make BC = 3ba, take the midpoint D of BC, know ad = 2cm (as shown in the figure), and find the length of BC
• 2. Extend the line segment AB to point C so that BC = 2Ab, and extend the line segment Ba to point d so that ad = 1 / 2Ab, then AB: AC=___ ,CD:BD=___
• 3. Extend the line AB to C, so that BC = 1 / 2Ab, extend Ba to D, so that ad = 1 / 3aC, if CD = 16cm, find the length of AB (figure also)
• 4. Extend the line AB to C so that BC = AB, and then extend Ba to d so that ad = 2Ab, then BC = () AB () AC; BD = () AB = () CD
• 5. If line segment DB = 2cm, extend BD to a so that Ba = 5cm, point C is a point on line AB, AC = 1.2cm, then the length of CD is () cm
• 6. Given the line AB = a, extend the line Ba to the point C so that AC = 1 / 2Ab, and the point D is the midpoint of the line BC
• 7. Given that point C is the midpoint of line AB, point D is the midpoint of line BC, CD = 2.5cm, please find out the length of line AB, AC, ad and BD Use ∵, ∵. ∵ C is the midpoint of ab, ∴......................
• 8. It is known that the line segment ad = 10 cm, the line segment AC = BD = 7 cm, e and F are the midpoint of the line segments AB and CD respectively, and the length of EF is calculated
• 9. Given that point B is the midpoint of line ad, point C is the midpoint of line BD, CD = 2.5cm, please find out the length of line AB, AC, ad and BD?
• 10. As shown in the figure, it is known that the line segment ad = 6cm, the line segment AC = BD = 4cm, e and F are the midpoint of the line segments AB and CD respectively, and EF is calculated
• 11. As shown in the figure, given BA ⊥ BD, CB ⊥ CD, ad = 8, BC = 6, then the value range of BD length of line segment is______ ．
• 12. As shown in the figure, given BA ⊥ BD, CB ⊥ CD, ad = 8, BC = 6, then the value range of BD length of line segment is______ ．
• 13. AB = 20cm, C and D are two points on the line AB, CD = 8cm (1). If e is the midpoint of AD and F is the midpoint of BC, find the length of EF. (Fig. 1) (Fig. 1) a --- C --- e -------- D --- f -------- B (2) If you translate CD along the ray AB to the extension line of AB, what is the length of ef?
• 14. As shown in the figure, the length of line segment AB is 20cm, C is the point on line segment AB, AC = three fourths AB, extend AB to D reversely, so that ad = one fourth AB, P is the midpoint of line segment CD, given AP = 15cm, calculate the length of line segment CD
• 15. As shown in the figure, D and C are two points on the line AB, ad = 5 / 9dB, AC = 9 / 5CB, and CD = 4cm. Try to find the length of ab
• 16. As shown in the figure, given that there are two points c and D on the line AB, and AC: CB = 2; 5, ad; DB = 5; 6 and CD = 13, find the length of ab AB is at both ends of the line, and the order from left to right is a, C, D, B
• 17. If there is a point m on the line L, and Mn = 6cm is intercepted on the line L, and MP = 10cm is intercepted in the opposite direction from the point m, what is the distance between the midpoint of Mn and the midpoint of NP
• 18. If AB = 6 and AC = 10 are intercepted on the line, then the distance between the midpoint of AB and AC is?
• 19. On the straight line L intercept AB = 6cm, AC = 10cm, then the distance between the midpoint of AB and the midpoint of AC is (solution and answer)
• 20. If AB = 4cm, BC = 1cm, then AC = () A. 1cmB. 2cmC. 3cmD. 4cm