Show that the points A (1, 1, 1), B(1, 2, 3) andC(2, –1, 1) are vertices of an isosceles triangle.

Show that the points A (1, 1, 1), B(1, 2, 3) and
C(2, –1, 1) are vertices of an isosceles triangle.

Matching exercise

Match the items on the right to the items on the left.

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