| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.77 |
| Score | 0% | 75% |
If side x = 14cm, side y = 14cm, and side z = 12cm what is the perimeter of this triangle?
| 31cm | |
| 27cm | |
| 40cm | |
| 25cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 14cm + 14cm + 12cm = 40cm
If angle a = 54° and angle b = 51° what is the length of angle c?
| 109° | |
| 99° | |
| 75° | |
| 80° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 54° - 51° = 75°
If a = 2, b = 5, c = 9, and d = 7, what is the perimeter of this quadrilateral?
| 18 | |
| 23 | |
| 22 | |
| 24 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 2 + 5 + 9 + 7
p = 23
Order the following types of angle from least number of degrees to most number of degrees.
right, acute, obtuse |
|
acute, obtuse, right |
|
acute, right, obtuse |
|
right, obtuse, acute |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
Simplify (y - 1)(y + 7)
| y2 + 6y - 7 | |
| y2 - 8y + 7 | |
| y2 - 6y - 7 | |
| y2 + 8y + 7 |
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 - 1)(y + 7)
(y x y) + (y x 7) + (-1 x y) + (-1 x 7)
y2 + 7y - y - 7
y2 + 6y - 7