Geometry

Polygons

100

A polygon with 8 sides is called this.

Octagon

200

A 10-sided figure is called a _____________.

Decagon

300

The number of degrees in a heptagon

900^o

400

The number of total degrees in a 22-sided figure.

3600^o

500

The number of degrees in one angle of a regular 15-gon

156^o

600

The number of sides in a regular polygon if each angle measures 160^o

18

Angle Pairs

100

This is the supplement of a 65^o angle

115^o

200

Congruent angles that are opposite each other at a point of intersection are called.

Vertical angles

300

When two parallel lines are intersected by a transversal, these two congruent angles are in the same position

Corresponding

400

Same-side interior angles have this relationship when lines are parallel

They are supplementary

500

Angles that share a vertex and a ray in common are called this

Adjacent angles

600

One angle in a linear pair is 4x - 8.  The other angle is 2x + 2.  Solve for x

x = 31

Terms

100

This is a 2-dimensional flat surface that extends infinitely.

Plane

200

a + b = b + a, demonstrates this algebraic property

Commutative Property of Addition

300

A triangle with no congruent sides is called _________

Scalene

400

Lines that are not coplanar and never intersect are called ____________

Skew

500

If m<a = m<b and m<b = m<c, then m<a = m<c demonstrates this Property

Transitive Property

600

Points in the same  plane are said to be __________

Coplanar

Equations

100

Write the equation of  a vertical line through the point (4, -1)

x = 4

200

Write the equation of a line in point-slope form that is parallel to the line y = x and passes through the point (2, -3)

y + 3 = (x - 2)

300

Write the equation of a line perpendicular to x + 2y = 2 and passing through the point (4, 1)

y = 2x - 7

400

Solve the system of equations:

   x + y = 2

   2x + 7y = 9

(1, 1)

500

Solve the system of equations:

-20x + 18y = 35

  10x -  9y = -17

No solution

600

One endpoint of a segment is (14, -3).  The coordinates of the midpoint are (-2, -7).  Find the coordinates of the other endpoint of the segment.

(-18, -11)

Triangles

100

The vertex angle of an iscoceles triangle measures 72^o.  This is the measure of a base angle.

54^o

200

Two interior angles in a triangle measure 35^o and 73^o.  This is the measure of the remote exterior angle.

108^o

300

The perpendicular bisectors of a triangle intersect at this point.

Circumcenter

400

This line segment, in a triangle, connects a vertex to the midpoint of the opposite side.

Median

500

This is the point of concurrency of the altitudes in a triangle.  

Orthocenter

600

The circumcenter is the point of concurrency of these lines in a triangle.  

Angle Bisectors