Midterm Review

Alternate Exterior Angles

• Two angles formed by two lines and a transversal that lie outside the 2 lines and on opposite sides of the transversal.

• Two angles formed by two lines and a transversal that lie inside the 2 lines and on the same side of the transversal.

• Two angles that are equal in measure but not necessarily formed by a transversal.

• Two angles that are supplementary and formed by two intersecting lines.

Right Angle

• An angle that measures exactly 90 degrees.

• An angle that measures exactly 45 degrees.

• An angle that measures less than 90 degrees.

• An angle that measures more than 180 degrees.

Equilateral Triangle

• A triangle with 3 congruent sides.

• A triangle with one right angle.

• A triangle with all sides of different lengths.

• A triangle with two equal sides.

Point

• A location, represented by a dot. Named with one point (Capital Letter).

• A line that connects two points.

• A shape with three sides.

• A flat surface that extends infinitely.

Collinear

• On the same line

• In different planes

• At right angles

• Parallel to each other

Alternate Interior Angles

• Two angles formed by two lines and a transversal that lie outside the two lines and on the same side of the transversal.

• Two angles formed by two lines and a transversal that lie between the two lines and on opposite sides of the transversal.

• Two angles formed by two lines that are parallel and do not intersect.

• Two angles formed by two lines and a transversal that lie between the two lines and on the same side of the transversal.

Line

• Has no thickness, extends forever in 2 directions. Named with 2 points.

• Has a definite length and width, can be measured.

• Is a closed figure with three or more sides.

• Is a straight path that can be drawn on a plane.

Plane

• A flat surface that extends forever in all directions. Named with 3 points.

• A three-dimensional object with length, width, and height.

• A curved surface that can be defined by a single point.

• A geometric figure with only two dimensions, length and width.

Equiangular Triangle

• A triangle with 3 congruent angles.

• A triangle with one right angle.

• A triangle with all sides of different lengths.

• A triangle with two equal angles.

Legs of an Isosceles Triangle

• The two congruent sides of the triangle

• The longest side of the triangle

• The base of the triangle

• The angles opposite the congruent sides