Section 1

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ray, opposite rays

Front

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Last updated

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Date created

Mar 1, 2020

Cards (42)

Section 1

(42 cards)

ray, opposite rays

Front

a part of a line that starts at one endpoint and extends forever

Back

Vertical Angles

Front

A pair of opposite congruent angles formed by intersecting lines

Back

Obtuse triangle

Front

A triangle with one angle that is greater than 90 degrees.

Back

distance

Front

How far it is from one point to another

Back

Angle bisector

Front

a ray that divides an angle into two congruent angles

Back

Vertex angle

Front

The angle formed by the legs of an isosceles triangle.

Back

SSS postulate

Front

If three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent.

Back

Midpoint

Front

A point that divides a segment into two congruent segments

Back

triangle sum theorem

Front

The sum of the measures of the interior angles of a triangle is 180 degrees

Back

adjacent angles

Front

Two angles that share a common side and have the same vertex

Back

y-intercept

Front

The point where the graph crosses the y-axis

Back

complementary angles

Front

Two angles whose measures add to 90 degrees.

Back

Angle addition postulate

Front

If P is in the interior of <RST, then m<RSP + m<PST = m<RST

Back

Segment addition postulate

Front

If B is between A and C, then AB + BC = AC

Back

slope intercept form of a line

Front

Back

Congruent

Front

Having the same size and shape

Back

Isosceles triangle

Front

a triangle with at least two congruent sides

Back

transversal

Front

a line that intersects two or more coplanar lines at different points

Back

alternate interior angles

Front

angles between 2 lines and on opposite sides of a transversal

Back

perpendicular lines

Front

Lines that intersect to form right angles

Back

conclusion

Front

A summary based on evidence or facts

Back

Line

Front

1. A long thin mark on a surface. 2. A continuous extent of length, straight or curved, without breadth or thickness; the trace of a moving point. 3. Long, narrow mark or band.

Back

Scalene triangle

Front

a triangle with no congruent sides

Back

Supplementary angles

Front

Two angles whose sum is 180 degrees

Back

coplanar

Front

points that lie on the same plane

Back

AAS postulate

Front

If two angles and a non-included side of one triangle are congruent to two angles and a non-included side of another, then the two triangles are congruent.

Back

Linear Pair

Front

A pair of adjacent angles whose noncommon sides are opposite rays.

Back

Regular triangle

Front

All congruent sides and angles

Back

Acute triangle

Front

A triangle that contains only angles that are less than 90 degrees.

Back

Line segment

Front

A part of a line with two endpoints

Back

SAS postulate

Front

If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the triangles are congruent.

Back

corresponding angles

Front

Angles formed by a transversal cutting through 2 or more lines that are in the same relative position.

Back

parallel lines

Front

lines in the same plane that never intersect

Back

Right triangle

Front

a triangle with one right angle

Back

same side interior angles

Front

two interior angles on the same side of the transversal

Back

Segment bisector

Front

a segment, ray, line, or plane that intersects a segment at its midpoint

Back

HL Postulate

Front

If a hypotenuse and leg of one right triangle are congruent to the corresponding hypotenuse and leg of a second right triangle, then the triangles are congruent.

Back

Collinear

Front

Points that lie on the same line

Back

Equilateral triangle

Front

A triangle with three congruent sides

Back

conditional statements

Front

A statement that can be written in if-then form.

Back

hypothesis

Front

A testable prediction, often implied by a theory An educated guess

Back

alternate exterior angles

Front

Angles that lie outside a pair of lines and on opposite sides of a transversal.

Back