| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
If a = c = 5, b = d = 4, what is the area of this rectangle?
| 45 | |
| 18 | |
| 20 | |
| 30 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 5 x 4
a = 20
Which of the following is not true about both rectangles and squares?
the lengths of all sides are equal |
|
the perimeter is the sum of the lengths of all four sides |
|
all interior angles are right angles |
|
the area is length x width |
A rectangle is a parallelogram containing four right angles. Opposite sides (a = c, b = d) are equal and the perimeter is the sum of the lengths of all sides (a + b + c + d) or, comonly, 2 x length x width. The area of a rectangle is length x width. A square is a rectangle with four equal length sides. The perimeter of a square is 4 x length of one side (4s) and the area is the length of one side squared (s2).
What is the area of a circle with a radius of 5?
| 64π | |
| 36π | |
| 25π | |
| 7π |
The formula for area is πr2:
a = πr2
a = π(52)
a = 25π
Simplify (y + 6)(y + 6)
| y2 - 12y + 36 | |
| y2 + 12y + 36 | |
| 57 | |
| y2 - 36 |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses:
(y + 6)(y + 6)
(y x y) + (y x 6) + (6 x y) + (6 x 6)
y2 + 6y + 6y + 36
y2 + 12y + 36
A(n) __________ is to a parallelogram as a square is to a rectangle.
rhombus |
|
quadrilateral |
|
triangle |
|
trapezoid |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.