Grade 5

This problem may be read to students and they can share their ideas orally.

One side of an isosceles triangle measure 5 cm. What can you say about the triangle?

- One of the other sides can measure 5 cm, and the third side could then have some other length.
- Or, both second and third sides could be the same length, but different from 5 cm.
- If all three sides are 5 cm long, then the triangle would be both isosceles and equilateral!
- The angles that are opposite each of the congruent sides will have the same measures.
- The triangle could be acute, obtuse, or right.

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