###
triangle

a polygon with three sides

###
scalene

no sides are congruent

###
isoscles

two sides are congruent

###
equilateral

all sides are congruent

###
acute triangle

three acute angles

###
right triangle

one right angle

###
obtuse triangle

one obtuse angles

###
equilangular triangle

three congruent angles

###
triangle sum theorm

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

###
exterior angles theorm

the measure of an exterior angles of a triangle is equal to the sum of the measures of the two nonadjacent interior angles

###
collary to a theorm

a statement that can be proved easily using a theorm

###
collary to the triangle sum theorm

the acute angles of a right angle are complementary

###
third angles congruence theorm

if two angles of one triangle are congruent to two angles of another triangle, then the third angles are congruent

###
SSS congruence postulate

if three sides of one triangle are congruent to three sides of a second triangle, then the two triangles are congruent

###
SAS congruence postulate

If two sides of one triangle are congruent to two sides and the included angle of a second triange, then the triangles are congruent

###
HL congruence postulate

if the hypotenuse and leg of a right triangle are congruent to the hypotenuse and leg of a second right triangle, then the two triangles are congruent

###
ASA congruence postulate

if two angles and the included side of one triangle are congruent to two angles and the included side of a second triangle, then the triangles are congruent

###
AAS congruence theorm

if two angles and the non included side f only riangle are congruent to two angles and the corresponding non included side of a second triange, the the triangles are congruent

### Please allow access to your computer’s microphone to use Voice Recording.

## We can’t access your microphone!

### Click the icon above to update your browser permissions and try again

Example:

### Reload the page to try again!

Reload

## Press Cmd-0 to reset your zoom

## Press Ctrl-0 to reset your zoom

### It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

## Your microphone is muted

### For help fixing this issue, see this FAQ.