### isosceles

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"having two equal sides," 1550s, from Late Latin isosceles, from Greek isoskeles "with equal sides," from isos "equal" (see iso-) + skelos "leg," from PIE *skel-es-, from root *(s)kel- (3) "crooked" (see scoliosis).
1. The base angles of an isosceles triangle are equal.

2. He tried to prove that the triangle was isosceles.

3. The diagonals of a ( an ) isosceles [ trapezoid, trapezoid, parallelogram ] are congruent.

4. Conclusions In general, endometrial cavity is mostly isosceles triangle or equilateral triangle.

5. The an isosceles triangle are equal.