x = \(\dfrac{2}{3}\)

The sphere of the Earth is always half illuminated by the Sun, so day and night are born, because the Earth rotates on its axis, in turn, every part of the Earth's surface is illuminated by the sun.

Chiều rộng của mảnh vườn là: 90 : ( 4 + 5 ) x 4 = 50 (dm)

Chiều dài của mảnh vườn là: 90 – 40 = 50 (dm)

Diện tích của mảnh vườn là:50 x 40 = 2000 (dm²)

             2000 dm2 = 20 m²

             Đáp số: 20 m²

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sai hết

The basic reason why planets orbit or orbit the sun is because the sun's gravity "holds" the planets in their orbits. Just as the moon revolves around the earth by the gravity of the earth, the earth revolves around the sun by the gravitational force of the sun.