| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.04 |
| Score | 0% | 61% |
The dimensions of this trapezoid are a = 5, b = 4, c = 8, d = 5, and h = 4. What is the area?
| 37\(\frac{1}{2}\) | |
| 18 | |
| 20 | |
| 24 |
The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:
a = ½(b + d)(h)
a = ½(4 + 5)(4)
a = ½(9)(4)
a = ½(36) = \( \frac{36}{2} \)
a = 18
The dimensions of this cube are height (h) = 4, length (l) = 3, and width (w) = 4. What is the surface area?
| 188 | |
| 80 | |
| 214 | |
| 148 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 3 x 4) + (2 x 4 x 4) + (2 x 3 x 4)
sa = (24) + (32) + (24)
sa = 80
A right angle measures:
360° |
|
45° |
|
90° |
|
180° |
A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.
A(n) __________ is to a parallelogram as a square is to a rectangle.
rhombus |
|
triangle |
|
quadrilateral |
|
trapezoid |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
vertical, supplementary |
|
obtuse, acute |
|
acute, obtuse |
|
supplementary, vertical |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).