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the number of electrons in the outer shell is between one to four, the compound is said to have positive valency. For compounds with electrons four, five, six, or seven, the valency is determined by subtracting the electron from eight.
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A triangle has three sides, three vertices, and three angles. 2 The sum of the three interior angles of a triangle is always 180°. 3 The sum of the length of two sides of a triangle is always greater than the length of the third side. 4 A triangle with vertices P, Q, and R is denoted as △PQR
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