Quadrilaterals
What do the angles in a triangle have to add up to?
180
Name the 3 right triangle trig ratios and what they are. (blank over blank)
sin=opposite/hypotenuse
cos=adjacent/hypotenuse
tan=opposite/adjacent
What is the relationship between the radius and diameter of a circle?
The radius is half the diameter OR the diameter is 2 times the radius
What does an intersection mean in probability?
AND (we look for the overlap of 2 events)
What do the angles in a quadrilateral have to add up to?
360
If you are given 2 sides of a right triangle and you need to find the missing side, what theorem should you use?
Pythagorean Theorem
If you need to find a missing side in a right triangle, should you use the regular trig functions or the inverse trig functions?
Regular trig functions
How do you find the circumference of a circle?
C=pi times diameter OR C=2pi times radius
What does a union mean in probability?
OR, we add the probabilities of A and B
Name 3 tests that we can use to prove a quadrilateral is a parallelogram.
Both pairs of opposite sides are congruent, both pairs of opposite angles are congruent, diagonals bisect each other, one pair of opposite sides is both parallel and congruent
If you are given a short side (leg) in a 45-45-90 triangle how would you find the long side (hypotenuse)?
Take the short side and multiply by radical 2
If you need to find a missing angle in a right triangle, should you use the regular trig functions or the inverse trig functions?
Inverse trig functions
How do you convert degrees to radians?
Multiply the degrees by pi/180
What does it mean to be independent versus dependent events?
Independent events do not affect each other, dependent events do affect each other
How can you find the length of a midsegment in a trapezoid?
Add the bases and divide by 2
If you are given the short side in a 30-60-90 triangle, how would you find the medium side?
Take the short side and multiply by radical 3
In a right triangle, you are given this triangle (on board) find x.
13.77
What do we know about the angles in a quadrilateral if it is inscribed in a circle?
Opposite angles are supplementary (add up to 180)
Give an example of 2 events that are not mutually exclusive
Example: having a dog or having a cat (you can have both)
If a quadrilateral is both a rectangle and a rhombus it is a....
Square!
If you are given the long side in a 30-60-90 triangle, how would you find the short side?
In a right triangle, you are given this triangle (on board) find theta.
28.8 degrees
What is the equation of a circle and what do the variables represent?
(x-h)^2+(y-k)^2=r^2, where (h, k) is the center and r is the radius
Give and example of two events that are mutually exclusive
Example: Being born in the United States and not being born and the United States (both can't be true at the same time)