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A trapezuim ABCD has two parallel sides AB and CD. The diagonals AC and BD intersect at E. If the areas of triangle CDE and CDB are 1 and 4 respectively, what is the area of the trapezuim ABCD
the length and width of a rectangle are in the ratio of 5:12. If its rectangle has an area of 240 square centimeters then what is the length in centimeters of its diagonal?
There are some balls in a bag. The remainder is 1 when groups of 3 balls are removed. The remainder is 2 when groups of 5 or 7 balls are removed. What is the smallest possible number of balls in the bag?
The average of three numbers is 42. All three are whole positive number and are different from each other.
If the least number is 20, what could be the greatest possible number of the remaining two numbers?
1,A circular cynlinder with a volume 81 pi.if the perimeter of the base is 6 pi,the height is ?2,The total surface area of 2 indentical blocks which together with the volume is 1,458 units is ?3,If one side of 6-inch ruler will be marked in inches,how many points will be in the edge including 0 and 6 inch mark?4,Two sides of the O and P pointer that started from a vertical position as shown.Pointer O turns back the clock with a speed of 5 degrees per second and pointer P rotate clockwise at9 deg...
Đọc tiếp
1,A circular cynlinder with a volume 81 pi.if the perimeter of the base is 6 pi,the height is ?
2,The total surface area of 2 indentical blocks which together with the volume is 1,458 units is ?
3,If one side of 6-inch ruler will be marked in inches,how many points will be in the edge including 0 and 6 inch mark?
4,Two sides of the O and P pointer that started from a vertical position as shown.Pointer O turns back the clock with a speed of 5 degrees per second and pointer P rotate clockwise at9 degrees per second.How many complete revolutions will be made when completing 335 P O complete revolution?
5,In a certain game of 50 questions,the final score calculated by subtracting tiwce the number of wrong answer from the total number of correct answers.if a player has tried all questions and get a final score of 35 ,the number of wrong answers,he has to be ...
Toán tiếng Anh: The average of three numbers is 42. All three are whole positive number and are different from each other.
If the least number is 20, what could be the greatest possible number of the remaining two numbers?
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Fill in the circles with the numbers 1, 2, 3, 4, 5, 6 and 7. Each number can be used once without repetitions. The sum of the digits inside the circles at the four vertices of the square on the left is 15 and the sum of the digits inside the circles at the vertices of the regular pentagon on the right is 24. How many possible arrangements are there?
The harmonic mean of a set of non-zero number is the reciprocal of the average of the reciprocals of the number. What is the harmonic mean of 1, 2, and 4?
Given a square with the length of one side is 8 cm and a isosceles triangle with the length of its base is 12 cm. If the area of the square is equal to the area of the isosceles triangle then what is the length of the height of the isosceles triangle, in cm?