Activity 3.1

3. is an interior angle which forms a linear pair with the given exterior angle.
6. atleast two sides have the same length.
8. is a set of all points in a plane.
10. is equal to the sum of its remote interior angles.
12. has four right angles and four congruent sides.
13. is a polygon formed by three segments joining noncollinear points
17. is equal to the sum of the squares of the lengths of two sides.
18. has four right angles.
19. is a segment contained in the ray, which bisects the angle of the triangle.

1. a distance from a given point in the plane.
2. has two pairs of parallel sides.
4. is equal to one half the measure of its intercepted arc.
5. is greater than any of its parts.
7. is the union of three or more coplanar segments, which intersects only at endpoints.
9. is a angle inscribed in a semicircle.
11. has exactly one pair of parallel sides.
14. are a vertex and a midpoint of the opposite side.
15. is an altitude of a triangle if its perpendicular from a vertex.
16. are angle which are not adjacent to the given exterior angle of the triangle.
20. has four congruent sides.