The Basics
2 triangles are congruent iff their __ sides and angles are congruent.
Corresponding
An acute triangle has __ acute angles.
three
The sum of the measures of the interior angles of a triangle is ___.
180 degrees.
An acute triangle is __ equilateral.
sometimes
You see...
it's funny because
A(n) __ triangle has 3 congruent sides.
equilateral
An __ triangle has 3 congruent angles.
equiangular
The measure of an exterior angle of a triangle is equal to the sum of its ___.
remote interior angles
An equilateral triangle is __ isosceles.
always
The first reason is a proof is always ___.
given
An __ triangle has at least 2 congruent sides.
isosceles
A __ triangle has exactly 1 right angle.
right
The acute angles of a right triangle are __.
complementary
An obtuse triangle is ___ an isosceles triangle.
sometimes
What is the distance formula?
d=sqrt((x2-x1)^2+(y2-y1)^2
A __ triangle has no congruent sides.
scalene
An __ triangle has exactly 1 angle larger than 90 degrees.
obtuse
The ___ angle of a triangle forms a linear pair with its adjacent interior angle.
exterior
An interior angle of a triangle and one of its adjacent exterior angles are ___ supplementary.
always
If parallel lines are cut by a transversal, the ____ angles are supplementary.
consecutive interior
The hypotenuse of a right triangle is the side opposite (across from) the __.
right angle
The __ of a right triangle are the sides opposite (across from) the acute angles.
legs
Literally translated from Greek, the hypotenuse of a right triangle means, "____."
stretched between two arms
A triangle ___ has a right angle and an obtuse angle.
never
VISUAL DAILY DOUBLE. What is this called? (spelling counts)
icosadodecahedron