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1. In your own words, define a triangle.

2. An isosceles triangle has

3. An acute triangle has

4. A scalene triangle has ___ equal sides.

5. A triangle with angle measures 40°, 90°, and 50° is a(n) _____________ triangle.

6. A triangle with a 104° angle is a(n) _______________ triangle.

7. A triangle with sides lengths: 4.5 cm, 4.5 cm, and 8 cm is a(n) ___________ triangle.

8. What is the measure of the missing angle?

9. A triangle has 2 sides that are congruent. One angle is 80° and another angle is 80°.
What type of triangle is it and what is the measure of the third angle?

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