# Honors Geometry Midterm Exam Terms

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Honors Geometry Midterm Exam - Chapter 1 Terms

### Acute Angle

An angle more than 0º but less than 90º

Angles that share a common side and vertex

### Angle Bisector

Ray that divides an angle in half

### Circumference

A circle's perimeter

### Collinear Points

Points on the same line

### Complementary Angles

2 or more angles that add up to 90º

### Coplanar Points

Points in the same plane

### Diameter

A segment that passes through the center of a circle and the endpoints are on the circle

### Hypotenuse

The side opposite the right angle (longest side)

Resulting figure

### Linear Pair

A pair of adjacent angles whose non common side forms a line

### Midpoint

M; the point that cuts a segment in half

### Obtuse Angle

An angle more than 90º but less than 180º

### Preimage

Original figure

A segment whose endpoints are the center of the circle and a point on the circle

### Reflection

(Flip) transformation across a line

### Straight Angle

An angle exactly 180º

### Supplementary Angles

2 or more angles that add up to 180º

### Transformation

A change in position, size, or shape of a figure

### Translation

(Slide) transformation in which all the points of a figure move the same distance in the same direction

Common endpoint

### Vertical Angles

2 nonadjacent angles formed by 2 intersecting lines

Example: