Geometry Proof Vocab 2

3. these are given statements that prove a mathematical concept is true and are composed of two parts.
4. these are lines or sides of a shape that intersect to form 90 degree angles.
7. this property means that a number or side length is always equal to itself.
11. big ideas that are accepted as universal truths without proof.
14. sides or angles that are located in the same position and with the same measurement for polygons with an equal number of sides.
16. when a number of object is replaced with an equivalent one.
17. a claim made in reference to a figure or math concept.
18. the supporting evidence for the respective statement made that must be theorems, properties, or other rules accepted by the math community.
19. this property of equality states that if two numbers of variables equal one another, then they must also equal each other. Ex: if a = b and b = c, then a = c.

1. a __________ angle has a measure of 180 degrees.
2. when two angles whose measures have a sum of 90 degrees they are _____________.
5. these are lines in the same plane that never intersect or meet.
6. these nonadjacent angles are formed by two intersecting lines.
8. a statement that has been proven or can be proven using math reasoning.
9. this is a line intersecting a system of lines, usually a set of parallel lines.
10. an object is said to have _______________ if it can be divided into two identical halves.
12. these two angles’ measures have a sum of 180 degrees.
13. similar to a postulate, this is something that is accepted as true without proof.
15. when two figures, shapes, or objects have the same size and shape.
16. shapes that are ________ are resized versions of the same shape.