If the number of endpoints in a line, ray and a line segment is represented by X, Y, and Z, what is the value of X + Y + Z ? [2 MARKS]

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Solution

Steps: 1 Mark
Result: 1 Mark

The number of endpoints in a line is zero.

$\Rightarrow X = 0$

The number of endpoints in Ray is 1

$\Rightarrow Y = 1$

The number of endpoints in a line segment is 2.

$\Rightarrow Z = 2$

$∴ X + Y + Z = 3$

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