## What are the 4 theorems?

Chapter 4 Angles and Perpendiculars Theorem 4-1 Congruence of angles is reflexive, symmetric, and transitive. Theorem 4-2 If two angles are supplementary to then same angle, the they are congruent. other. Theorem 4-4 If two angles are complementary to the same angle, then they are congruent to each other.

### What are the 8 theorems?

What are the 8 circle theorems?

- Circle Theorem 1 – Angle at the Centre.
- Circle Theorem 2 – Angles in a Semicircle.
- Circle Theorem 3 – Angles in the Same Segment.
- Circle Theorem 4 – Cyclic Quadrilateral.
- Circle Theorem 5 – Radius to a Tangent.
- Circle Theorem 6 – Tangents from a Point to a Circle.

**What are the 6 theorems in geometry?**

23 Cards in this Set

Polygon Angle- Sum Theorem (Theorem 6-1) | The sum of the measure of the interior angles of an n-gon is (n-2)180 |
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Theorem 6-6 If a quadrilateral is a parallelogram, then its what bisect each other? | diagonals If a quadrilateral is a parallelogram, then its diagonals bisect each other. |

**What is the second circle theorem?**

“If two angles subtended at the center by two chords are equal, then the chords are of equal length.”

## What are the different postulates in geometry?

A straight line segment may be drawn from any given point to any other.

### What are all the postulates?

Things which are equal to the same thing are equal to one another.

**What are the properties of geometry?**

Math Study Strategies Learning Center The Reflexive Property a =a The Symmetric Property If a=b, then b=a The Transitive Property If a=b and b=c, then a=c The Substitution Property If a=b, then a can be substituted for b in any equation The Addition and Subtraction Properties If a=b, then a+c = b+c and a-c = b-c

**What is the interior angle theorem?**

What is the interior angle theorem of a triangle? In geometry, the interior angles of a triangle are the angles that are formed inside a triangle. Interior angles have the following properties: The sum of interior angles is 180 degrees (Triangle Angle Sum Theorem). All interior angles of a triangle are more than 0° but less than 180°.