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 two sides that have the same length and name that triangle.
isosceles triangle
What is a quadrilateral with exactly one pair of parallel sides?
trapezoid
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 three sides the same length?
equilateral triangle
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
This quadrilateral has for equal sides, four right angles, and 2 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 that has no sides the same length?
scalene triangle
A parallelogram that has four right angles.
rectangle
All squares are rhombuses.
True or False?
True; Squares have four equal sides.
A trapezoid is _________________ a quadrilateral.
sometimes always never
always
A triangle that has no sides with the same length.
scalene
What is the name of a triangle who has the following angle degrees: 35 degrees, 110 degrees, 35 degrees
obtuse isosceles triangle
Which set of lengths cannot be the side lengths of a parallelogram:
a. 9yd, 5yd, 5yd, 3yd
b. 4m, 2m, 4m, 2m
c. 7ft, 8ft, 8ft, 7ft
a. 9yd, 5yd, 5yd, 3yd
All rectangles are parallelograms. Are all parallelograms rectangles? Explain.
No; For a parallelogram to be a rectangle, it must have four right angles.
Parallelograms _________________ include trapezoids.
sometimes always never
never