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A black outline drawing of an equilateral triangle with two concentric circles inside. The inner circle has a diameter labeled 6 cm, and the base of the triangle is labeled 15 cm.

A black outline drawing of an equilateral triangle with two concentric circles inside. The inner circle has a diameter labeled 6 cm, and the base of the triangle is labeled 15 cm.
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add two concentric circles to the center of the triangle, 8 cm and 6 cm diameters respectively See more

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