| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.73 |
| Score | 0% | 75% |
If angle a = 42° and angle b = 33° what is the length of angle c?
| 64° | |
| 105° | |
| 84° | |
| 69° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 42° - 33° = 105°
If side x = 6cm, side y = 8cm, and side z = 6cm what is the perimeter of this triangle?
| 33cm | |
| 20cm | |
| 41cm | |
| 32cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 6cm + 8cm + 6cm = 20cm
A quadrilateral is a shape with __________ sides.
3 |
|
2 |
|
4 |
|
5 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.
A trapezoid is a quadrilateral with one set of __________ sides.
equal length |
|
parallel |
|
right angle |
|
equal angle |
A trapezoid is a quadrilateral with one set of parallel sides.
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
supplementary, vertical |
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vertical, supplementary |
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acute, obtuse |
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obtuse, acute |
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).