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周长・面积与平面图形进阶
The width of a rectangle is 5 centimeters. The length of the rectangle is 30 centimeters longer than the width. What is the area, in square centimeters, of this rectangle?
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周长・面积与平面图形进阶
Circle N has a radius of 9 millimeters (mm). Circle M has an area of \( 25π \) mm². What is the total area, in mm², of circles N and M?
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周长・面积与平面图形挑战
The triangle inequality theorem states that the sum of any two sides of a triangle must be greater than the length of the third side. If a triangle has side lengths of 10 and 12. Which inequality represents the possible lengths, x, of the third side of the triangle?
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周长・面积与平面图形进阶
The triangle shown has one side with a length of x inches and two sides each with a length of y inches. The perimeter of the triangle is 47 inches. Which equation represents this situation?
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周长・面积与平面图形进阶
Circle T has a radius of 35 millimeters (mm). What is the area of circle T, in mm²?
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周长・面积与平面图形挑战

The figure shows a rectangular pool surrounded by a concrete path that is x feet (ft) wide on all sides. The pool is 21 ft long and 13 ft wide. The area of the concrete path is 240 ft2 . What is the value of x?
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周长・面积与平面图形进阶
The area of a rectangle is 108 square inches. The length of the longest side of the rectangle is 18 inches. What is the length, in inches, of the shortest side of this rectangle?
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周长・面积与平面图形进阶
Circle T has a radius of 25 millimeters (mm). What is the area of circle T, in mm²?
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周长・面积与平面图形进阶
A rectangular banner has an area of 2,300 square inches. A copy of the banner is made in which the length and width of the original banner are each increased by 20%. What is the area of the copy, in square inches?
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周长・面积与平面图形进阶
A rectangular poster has an area of 330 square inches. A copy of the poster is made in which the length and width of the original poster are each increased by 50%. What is the area of the copy, in square inches?
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周长・面积与平面图形进阶
The perimeter of a square can be expressed as 4(76) units. What is the length, in units, of a side of this square?
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周长・面积与平面图形进阶
The perimeter of an obtuse triangle is 27 meters. The lengths of two sides of this triangle are 5 meters and 9 meters. What is the length, in meters, of the third side of this triangle?
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