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The perimeter of a rectangle is 52cm, and the ratio of length to width is 8:5. What is the area of the rectangle? Urgent need
Length width sum: 52 △ 2 = 26cm
According to the proportion to solve the problem: length: 8 / 13, width: 5 / 13,
Then, length: 8 / 13 × 26 = 16 cm, width: 5 / 13 × 26 = 10 cm
Area: 16 × 10 = 160 square centimeter
The length and width of a rectangle are prime numbers, and the perimeter is 36 cm. What is the maximum area of the rectangle?
36 △ 2 = 18 (CM), 18 = 5 + 13 = 7 + 11, 13 × 5 = 65 (cm 2), 11 × 7 = 77 (cm 2), 77 > 65, a: the area of this rectangle is 77 cm 2 at most
The length and width of a rectangle are prime numbers, and the perimeter is 36 cm. What is the maximum area of the rectangle?
77
The length and width of a rectangle are prime numbers, and the perimeter is 36 cm. What is the maximum area of the rectangle?
36 △ 2 = 18 (CM), 18 = 5 + 13 = 7 + 11, 13 × 5 = 65 (cm 2), 11 × 7 = 77 (cm 2), 77 > 65, a: the area of this rectangle is 77 cm 2 at most
The perimeter of a quadrilateral is 24cm. It is known that the first side is ACM, the second side is 3cm less than 2 times of the first side, and the third side is equal to 13% of the sum of the first and the second sides. Answer the following questions: (1) write directly the expressions representing the lengths of the second, the third, and the fourth sides (to be simplified); (2) when a = 4cm or a = 7cm, can you still get a quadrilateral? If yes, please explain the reason; if not, please indicate what shape the figure is
(1) The formula of the second side length is 2a-3; the formula of the third side length is 13 (a + 2a-3) = A-1; the formula of the fourth side length is 24-a - (2a-3) - (A-1) = 28-4a; (2) when a = 4cm, the four side lengths are 4, 5, 3 and 12 respectively; when a quadrilateral cannot be obtained, the graph is an unclosed quadrilateral; when a = 7cm, the four side lengths are 7, 11, 6 and 0 respectively; Can't get quadrilateral, the figure is triangle
The circumference of a quadrilateral is equal to 54 cm. It is known that the first side is equal to a cm, and the second side is 4 cm shorter than the first,
The length of the third side is more than half of the length of the second side by 3cm. Use a to indicate that the length of the fourth side is
The title seems to be ambiguous: "the third side is more than half of the second side by 3cm" is to say "the third side is more than half of the second side by 3cm" or "the third side is more than half of the second side by 3cm"? Please read the original title clearly and ask again
The perimeter of a quadrilateral is 48 cm. It is known that the second side length is 3 cm more than twice the first side length. The third side length is equal to the sum of the first side length and the second side length,
If the length of the four sides is equal to the length of the first side, what is the length of the second side?
Let the first side be X
The second side length is 2x + 3
The third side is x + 2x + 3
The length of the fourth side is X
Because the perimeter of a quadrilateral is 48 cm
So x + 2x + 3 + X + 2x + 3 + x = 48
The solution is x = 6
So the second side is 15
The perimeter of a quadrilateral is 48 cm. It is known that the first side is a cm longer, the second side is 3 cm longer than twice the first side, and the third side is equal to the first side
The sum of two sides, write the integer that represents the length of the fourth side
48-（a+2a+3+a+2a+3）
=42-6a
The circumference of a rectangle is 48 cm, and the ratio of width to length is 3; 5. How many cm are its length and width
（1）48÷2=24
3+5=8
24×3/8=9
24×5/8=15
(2) In proportion
Let the length be x cm
X：24=3：8
X=9
The circumference of a rectangle is 48 cm, and the ratio of length to width is 5:3. How many cm are the length and width of the rectangle?
The sum of the length and width of the rectangle is 48 △ 2 = 24 cm, then: length: 24 × 55 + 3 = 15 (CM), width: 24 × 35 + 3 = 9 (CM), or 24-15 = 9 (CM); answer: the length of the rectangle is 15 cm, and the width is 9 cm
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