Triangles! Classifications & Related Vocabulary

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Across
  1. 5. A triangle with at least two congruent sides is called a(n) __ triangle.
  2. 7. A triangle with three congruent sides is called a(n) __ triangle.
  3. 8. The __ of the angle measures in any triangle is 180 degrees.
  4. 9. The acute angles of a right triangle have a sum of 90 degrees. That means that they are __ angles.
  5. 11. The non-congruent side of an isosceles triangle (when it has one) is called the __ of the triangle.
  6. 12. A triangle with a right angle is called a(n) __ triangle.
  7. 13. A triangle with an obtuse angle is called a(n) __ triangle.
  8. 14. A(n) __ of a triangle is one of the three points where the sides of a triangle meet.
Down
  1. 1. A triangle with 3 acute angles is called a(n) __ triangle.
  2. 2. A triangle with no congruent sides is called a(n) __ triangle.
  3. 3. The __ of a right triangle are the sides that form the right angle in the triangle.
  4. 4. The figure formed by three segments joining three noncollinear points is a(n) __.
  5. 5. The __ angles of a triangle are the angles inside of a triangle. EXTERIOR angles of a triangle are outside of the triangle. They are formed by extending a side of the triangle beyond the vertex of the triangle.
  6. 6. The __ of a right triangle is the longest side of the triangle. It is found across from the right angle of the triangle.
  7. 9. The LEGS of an isosceles triangle are the sides that are __.
  8. 10. An EQUIANGULAR triangle is a triangle with __ congruent angles.