- The intersection point of the three angle bisectors of a triangle
- Inscribed
- The intersection point of the three perpendicular bisectors of a triangle.
- Circumscribed
- The positioning of a shape after changes are made
- Image
- An ______ of a triangle is a segment that runs from one vertext perpendicular to the line that contains the opposite side.
- Altitude
- A _______ of a triangle is a segment that runs from one vertext of the triangle to the midpoint of the opposite side
- Median
- Two angles that have the same vertext between them , share a common side , and do not overlap
- Adjacent angles
- When two lines intersect , they form two pairs of opposite angles called ______
- Vertical angles
- Positioning of a shape before changes are made
- Pre-image
- An angle that is more than 90 degrees but less than 180 degrees
- Obtuse
- two-dimensional surface that extends infinitely far.
- Plane
- A____ Ray has one endpoint and extends forever in one direction
- Ray
- Something that extends in both directions
- Line
- Something that is usually represented by a dot
- Point
- Corresponding angles are
- Congruent
- Figures that have the same shape are
- Similar
- In similar quadrilaterals, corresponding sides are in
- Proportion
- quadrilateral whose four sides can be grouped into two pairs of equal-length sides that are adjacent to each other.
- Kite
- At least 3-points on the same plane
- Coplanar
- A point where lines intersect
- Intersection
- 2 angles whose measures add up to 180 degrees
- Supplementary

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