15-2x3=9 following the rule of PEMDAS
Answer:
9
Step-by-step explanation:
The cardinality of a set - the number of terms in that set.
in the set {2, 4, 6, ... 18}
We can assume that the numbers follow a pattern: in this case, the pattern is multiples of 2 till 18 starting with 2.
so that means that the full set is
{2, 4, 6, 8, 10, 12, 14, 16, 18}
There are 9 numbers in that set;
so the cardinality of the set is 9
1. Angle: <span>the union of two rays that have a common endpoint.
</span>2. Acute Angle: <span>an angle whose measure is greater than zero and less than 90°
</span>3. Right Angle: <span>an angle whose measure equals 90°.
</span>4. Obtuse Angle: <span>an angle with a measure greater than 90° but less than 180°.
</span>5. Bisector of an Angle: <span>a set of points which divides the angle into two angles of equal measure.
</span>6. Perpendicular Line: lines that intersect to form right angles.