Vocabulary
*An angle that is open less than a right angle
*An angle that measures less than 90 degrees
acute angle
Draw a triangle with one right angle and name that triangle
right triangle
What is a quadrilateral with two pairs of parallel sides?
parallelogram
Some rhombuses are squares.
True or false?
True; Rhombuses can have four right angles (square) but not always.
A rhombus is ____________ a square.
always sometimes never
sometimes
*An angle that forms a straight line
*An angle that measures 180 degrees
straight angle
What is the name of a triangle with all acute angles?
Acute triangle
What is a quadrilateral with four sides that have the same length?
rhombus or square
All rectangles have two pairs of parallel sides.
True or false?
True; rectangles have two pairs of parallel sides
A parallelogram is ___________ a quadrilateral.
always sometimes never
always
A quadrilateral that has exactly one pair of parallel sides
trapezoid
What is the name of a triangle with one 90 degree angle?
right triangle
What is a quadrilateral with four equal sides, four right angles, and two pairs of parallel sides?
square
Some parallelograms are trapezoids.
True or false?
False; parallelograms have two pairs of parallel sides
A trapezoid is _____________ a rectangle.
always sometimes never
never
A parallelogram that has four right angles
rectangle or square
A triangle has a 47 degree angle, a 58 degree angle, and a 75 degree angle.
What kind of triangle is it?
acute triangle
What is a parallelogram that has four right angles
rectangle or square
All squares are rhombuses.
True or false?
True; squares have four equal sides
A trapezoid is ___________ a quadrilateral.
always sometimes never
always
A triangle with one obtuse angle
obtuse triangle
A triangle has a 120 degree angle and two 30 degree angles.
What kind of triangle is it?
Obtuse triangle
Which set of sides lengths cannot be the side lengths of a parallelogram:
A. 9cm, 5c, 5cm,3cm
B. 4cm, 2c, 4cm, 2cm
C. 7cm, 8cm, 8cm, 7cm
A
All rectangles are parallelograms. Are all parallelograms rectangles?
True or false?
False; for a parallelogram to be a rectangle, it must have four right angles.
Parallelograms _______ include trapezoids.
always sometimes never
never