Rectangle ABCD is discounted along diagonal, ab = 4, ad = 3, what is quadrilateral aced Area is also required

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• 1. As shown in the figure, fold the rectangular piece of paper ABCD, first fold out the crease BD, and then fold so that the ad side coincides with the diagonal BD, and get the crease dg. if AB = 2, BC = 1, then the length of Ag is___ ．
• 2. As shown in the figure, in rectangular paper ABCD, ab = 4, ad = 3, fold the paper so that the ad side coincides with the diagonal BD, and the crease is DG, then the length of Ag is () A. 1B. 43C. 32D. 2
• 3. As shown in the figure, fold the rectangular piece of paper ABCD, first fold the crease (diagonal) BD, and then fold so that the ad edge coincides with BD, and get the crease DG, if AB = 4, BC = 3, find the length of Ag
• 4. As shown in the figure, fold the rectangular piece of paper ABCD, first fold out the crease BD, and then fold so that the ad side coincides with the diagonal BD, and get the crease dg. if AB = 2, BC = 1, then the length of Ag is___ ．
• 5. As shown in the figure, in rectangular ABCD, fold △ ABC along AC to △ AEC position, CE and ad intersect at point F. (1) try to explain: AF = FC; (2) if AB = 3, BC = 4, find the length of AF
• 6. In rectangle ABCD, ad = 3. BC = 4. If the rectangle is folded along the diagonal BD, what is the shadow area in the figure?
• 7. If the median line on the two right sides of a right triangle is 5cm and 2 √ 10cm respectively, the length of the oblique side is Such as the title
• 8. If the height and the length of the middle line on the hypotenuse of a right triangle are 5cm and 6cm respectively, then the area of the right triangle is 5cm______ ．
• 9. It is known that the lengths of the two right sides of a right triangle are 9cm and 5cm respectively, and the length of the hypotenuse is xcm (1) Estimate X between which two integers; (2) if the result of X is accurate to the tenth, estimate X between which two numbers, if accurate to the hundredth, verify your estimate with a calculator
• 10. 3. If the height and center line of the hypotenuse of a right triangle are 5cm and 6cm respectively, its area is cm
• 11. As shown in the figure, the quadrilateral ABCD is a rectangle, ab = 4AD = 3, fold the rectangle along the straight line AC, point B falls at point E, connect De, what is the figure of quadrilateral aced What about perimeter and area
• 12. In rectangle ABCD, ab = 10cm, ad = 3cm, fold the rectangle along the straight line AC, point B falls at point E, connect De, what is the figure of quadrilateral aced, and explain the reason And calculate its area
• 13. As shown in the figure, the quadrilateral ABCD is a rectangle, AB: ad = 4:3, fold the rectangle along the straight line AC, point B falls at point E, and connect De, then de: AC = 1___ ．
• 14. Quadrilateral ABCD is a rectangle, ab = 4cm, ad = 3cm, fold the rectangle along the straight line AC, and point B falls at e to connect de. what is the figure of quadrilateral aced? What's its area? What's its perimeter?
• 15. As shown in the figure, the quadrilateral ABCD is a rectangle, ad = 3, ab = 4. Fold the rectangle along the line AC, point B falls at point E, and connect De, then the length of De is () A. 1B. 95C. 725D. 75
• 16. As shown in the figure, e and F are the points on the diagonal AC and BD of rectangular ABCD, and AE = DF
• 17. As shown in the figure, fold the rectangular piece of paper ABCD along the diagonal AC, so that point B falls at point E. verify: EF = DF
• 18. In rectangle ABCD, ab = 10, BC = 8, fold the rectangle along AC, point d falls at point E, and CE and ab intersect at point F, then the length of AF is
• 19. In rectangle ABCD, ab = 4, BC = 6, fold the rectangle along AC, point d falls at e, and CE and ab intersect with F, then AF length is AB is not = 4, it is = 8
• 20. As shown in the figure, in rectangle ABCD, ab = 16, BC = 8, fold the rectangle along AC, point d falls at point E, CE and ab intersect at point F, (1) prove: AF = CF (2) find the length of AF