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describing a triangle with at least two sides of equal length
- The triangle has two equal sides, making it an isosceles triangle.
- In an isosceles triangle, the angles opposite the equal sides are also equal.
- She drew an isosceles triangle on the whiteboard to demonstrate the concept.
- The base angles of an isosceles triangle are congruent.
- The architect designed the roof of the house in the shape of an isosceles triangle.