Triangles
what is a obtuse triangle
a obtuse triangle has 1 obtuse angle and 2 acute angles
what shape has 4 right angles
rcetangle and a square
what shape has 8 sides
octagon
an angle that adds up to 90 degrees
a right angle
how many sides does a quadrilateral have
4 sides
what is a acute triangle
an acute triangle has three acute angles
what shapes angles all add up to 180 degrees
a tiangle
how many sides does a nonagon have
9 sides
an angle that is less than 90 degrees
and acute angle
a quadrilateral that has 4 right angles and all sides equal
a square
what is a right triangle
a right triangle has 1 right angle and 2 acute angles
what shape has 6 sides
hexagon
how many sides does a dodecagon have
12 sides
an angle that is greater than 90 degrees
an obtuse angle
a quadrilateral that has opposite sides parallel and 4 right angles
rectangle
what is an isosceles triangle
an isosceles triangle has at least 2 sides congruent
what shape has 5 sides
pentagon
how many sides does a heptagon have
7 sides
what angles are in a octagon
obtuse
a quadrilateral that has one pair of parallel lines and 2 obtuse angles and 2 acute angles
trapezoid
what is a scalene triangle
a scalene triangle has no sides congruent
how many sides a decagon have
10 sides
how many sides does a trapzoid have
4 sides
what angles are in a rectangle
right angles
a quadrilateral with 4 equal sides and 2 obtuse angles and 2 acute angles
rhombus