| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
What is 3a7 - 2a7?
| 6a7 | |
| 1a7 | |
| 1 | |
| 6a14 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
3a7 - 2a7 = 1a7
If the base of this triangle is 6 and the height is 3, what is the area?
| 42 | |
| 33 | |
| 9 | |
| 90 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 6 x 3 = \( \frac{18}{2} \) = 9
If side x = 10cm, side y = 11cm, and side z = 10cm what is the perimeter of this triangle?
| 31cm | |
| 37cm | |
| 32cm | |
| 29cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 10cm + 11cm + 10cm = 31cm
What is the circumference of a circle with a diameter of 9?
| 17π | |
| 9π | |
| 30π | |
| 28π |
The formula for circumference is circle diameter x π:
c = πd
c = 9π
Which types of triangles will always have at least two sides of equal length?
equilateral and isosceles |
|
equilateral and right |
|
isosceles and right |
|
equilateral, isosceles and right |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.