The image shows pages from a math textbook. One problem asks to find what percentage 20 is out of 90. Another problem involves finding the distance between the first and fourth objects, given the distance between consecutive objects is 42. A geometry problem involves calculating the perimeter of a shape formed by two semicircles, each with a radius of 7 cm, using π = 22/7. Finally, there is a parallelogram ABCD problem with an isosceles triangle ABE where BA=BE, given angles ∠EBF=58° and ∠BEF=40°, needing to find the angle ∠CDA.

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Feb 1, 2026, 4:35 PM

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The image shows pages from a math textbook. One problem asks to find what percentage 20 is out of 90. Another problem involves finding the distance between the first and fourth objects, given the distance between consecutive objects is 42. A geometry problem involves calculating the perimeter of a shape formed by two semicircles, each with a radius of 7 cm, using π = 22/7. Finally, there is a parallelogram ABCD problem with an isosceles triangle ABE where BA=BE, given angles ∠EBF=58° and ∠BEF=40°, needing to find the angle ∠CDA.

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