Vocabulary
Lines that never intersect
parallel lines
A triangle with one angle that is exactly 90 degrees
Right Triangle
A type of triangle where all sides are equal.
Equilateral
A triangle with two congruent sides.
Isosceles.
The opposite sides of a parallelogram are congruent. What other of the following has opposite sides that are congruent.
a.kite
b. rectangle
c. trapezoid
rectangle
An exact location in space
point
An acute triangle has ____ acute angles.
3
A circle is a polygon. True or False.
False
A triangle with no congruent sides.
Scalene
A triangle with one obtuse angle.
obtuse triangle.
A part of a line that has one endpoint and goes on forever in one direction.
a ray
A triangle's angles must add up to ______ degrees.
180
A quadrilateral with exactly one pair of parallel lines.
Trapezoid.
A polygon with five sides.
Pentagon
A polygon with ten sides
decagon
Having the same size and shape
congruent
A rectangle has ______ obtuse angles.
0
Name the five main shapes that are quadrilaterals.
square, parallelogram, rhombus, trapezoid, and rectangle
A parallelogram with four equal sides.
Rhombus
How do you find the volume of a shape? What is the formula?
l x w x h
A solid or 3D figure with many sides or plane faces.
polyhedron
Straight angle
True or False: The properties of a parallelogram and square apply to a rhombus.
False. A square has 4 right angles and a rhombus does not.
A polygon with seven sides
Heptagon
A rectangle has opposite angles congruent.
a. always true
b. sometimes true
c. it is not true
always true