###
congruent angles

Angles that contain the same number of degrees.

###
right angle

An angle that has a square corner because it is fromed by perpendicular lines. All right angles are 90*.

###
acute angles

Angles that are less than 90*.

###
obtuse angles

Angles that are more than 90** but less than 180**.

###
straight angles

Angles that are 180*.

###
triangles

They have 3 angles. The sum of the angles of any triangle is 180*.

( A+ B+ C=180*)

###
right triangle

A triangle that has one right angle.

###
isosceles triangle

A triangle that has 2 congruent sides.

###
equilateral trianlge

A triangle that has 3 congruent sides.

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