Perimeter
What is the formula for perimeter?
What is the name of a polygon with 3 sides?
What is a triangle.
How many sets of parallel sides does a parallelogram have?
A parallelogram has 2 sets of parallel sides.
What is a parallelogram?
A parallelogram is a 2D quadrilateral with two sets of parallel lines.
What is the formula for area?
Area = length x width
Can you find the perimeter of a rectangle if you are only give the length and width? Why or why not?
Yes, because a rectangle has opposite sides congruent with each other. Not all four sides are congruent, but opposite sides are congruent. So you would be able to figure out the sides, not given. Then you would add up all four sides of the rectangle to find the perimeter.
What is the name of a polygon with 4 sides?
What is a quadrilateral.
If the time on the clock in our classroom showed a right angle, and the minute hand (the long hand) was pointing to the 12, what time could it be?
It could be 3:00 or 9:00.
What is a rhombus?
A rhombus is a parallelogram with 4 congruent sides.
What is the area of a square with the given side length of 5 inches?
The area is 25 square inches.
What is the perimeter of the shape in Mystery Problem 1?
What is 20 inches.
What is the name of the quadrilateral with only one set of parallel lines?
What is a trapezoid.
What is true of parallel lines?
Parallel lines will never cross.
What is a quadrilateral?
Any polygon with 4 sides (it will also then have 4 vertices).
Max measured his bedroom rug. It was 5 feet wide and 7 feet long. Which equation would Max use to find the area of his rug?
a: 7 + 5 = a
b: 7 + 7 + 5 + 5 = a
c: 7 x 5 = a
d: 7 divided by 5 = a
What is the perimeter of a rectangle with the given length of 6 inches, and the given width of 4 inches?
What is 20 inches.
What are two attributes of both squares and rectangles?
Both squares and rectangles have 4 right angles.
Both squares and rectangles have 2 sets of parallel sides.
Perpendicular lines make what kind of angle?
Perpendicular lines make a right angle, also known as a 90 degree angle.
What is a polygon?
A polygon is a 2D closed shape with at least three straight sides.
What is the area of the of the shape in Mystery Problem 2?
What is 52 square feet.
The perimeter of a triangle is 18 centimeters. Side A is 4 centimeters, side B is 12 centimeters. What is the length of side C?
Side C is 2 centimeters.
What do rhombuses and squares both have in common, that rectangles do not?
Both squares and rhombuses have congruent sides, meaning all the sides are equal length.
List the three angles we have learned about in order from smallest angle to largest angle.
acute angle
right angle
obtuse angle
List three similarities and three differences between a rhombus and a trapezoid. (Use mathematical language from the word bank in each.)
Similarities:
-Both have 4 sides, both have at least one pair of parallel sides, both have one pair of acute angles, both have obtuse angles.
Differences:
-The trapezoid has one pair of parallel sides; the rhombus has two pairs. -The rhombus has two lines of symmetry; the trapezoid has one. -The rhombus has 4 congruent sides; a trapezoid can have 0-3 congruent sides.