Final Flashcards
Ratio of Perimeter
Scale Factor
Ratio of Area
(Scale Factor)^2
Ratio of Volume
(Scale Factor)^3
How to do Fraction on Calculator
- `Divide
- Hit Math
- Choose Frac
- Hit enter
Midpoint Formula
(x1 + x2) / 2 , (y1 + y2) / 2
Slope Formula
(y2 - y1) / (x2 - x1)
Distance Formula
d = √ (x2 - x1)^2 + (y2 - y1)^2
30 - 60 - 90 Shorter Leg
LL / √3 hyp/2
30 - 60 - 90 Longer Leg
sl x √3
30 - 60 - 90 Hypotenuse
sl x 2
45 - 45 - 90 Shorter Leg
divide by √2
45 - 45 - 90 Hypotenuse
sl x √2
A 45 - 45 - 90 is also an…
Isosceles Right Triangle
When multiplying radicals you…
- Multiply insides radical
- Multiply outside radical
- Simplify
Radicals only cancel if…
x√x not x√y
A tangent and radius are
Perpendicular
When adding number and another number with pi you…
Put the number without pi first in the equation
Perpendicular Slopes
Negative Reciprocoal
Parallel Slopes
Same slope
To divide radicals…
- If both inside radicals, just divide, and leave outside alone
- Or multiply by radical ex. √x / √x • x / √x = x√x /x = √x
What does midpoint do?
Split a line into two equal parts.
What does a bisector do?
Bisectors make two equal segments, only perpendicular bisectors make two equal, perpendicular halves.
The largest side faces the _____ angle
Largest angle
What is this triangle: a^2 + b^2 > c^2
The triangle is acute.