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Given 4 circles fit inside a square with perimeter 16cm. Find the perimeter of the shaded region in cm. Cho…

They need 3 jars of paint to cover all faces of a cube as in figure 1. How many jars…

Peter draws a quadrilateral ABCD on a grid paper. Each cell has side length of 1cm. Find the area of…

Find the sum of interior angles in a regular 10-sided polygon. Tìm tổng tất cả các góc trong của một…

Given a right-angled triangle with area of 24cm2. The length of the shortest side is 6cm. Find the perimeter of…

At least how many revolutions does the wheel need to rotate to cover a distance of 440m, given that its…

Andy stacks some identical cubes with side length 2cm on top of each other to get the figure below. Find…

Given the perimeter of the biggest circle is 12π , find the total area of the shaded regions. Biết rằng chu…

In a plane, given the circle with center O. A line intersects the circle at 2 points A and B…

Given a rectangle with area 270 cm2. If both the length and the width of the rectangle increase by 3…