GRE Geometry Rules
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/19
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai | Chat |
|---|
No analytics yet
Send a link to your students to track their progress
20 Terms
Area of a triangle
area = ½ base x height
pythagorean theorem
a² + b² = c²
what are the 4 most common Pythagorean triples?
3-4-5
5-12-13
7-24-25
8-15-17
What is the relationship between an angle and a side on a triangle
what are the sides of a triangle that’s 90, 30 and 60 degrees?
what are the sides of a triangle that’s 90-45-45 degrees
third side rule
the third side of a triangle is greater than the difference of the other two sides and less than their sum
(a + b) > c > (b - a)
area of a parallelogram
area = base x height
sum of angles in a polygon
180(n - 2)
n = number of sides
volume of a cylinder
volume = 𝜋r²h
surface area of a cylinder
2𝜋r² + 2𝜋rh
surface area of a box
2lw + 2wh + 2lh
sector area and arc length are proportional to what?
angle size
an inscribed angle is equal to ___ of the arc it intercepts
half
what is the diameter of a circle?
2r
what is the circumference of a circle?
𝜋d or 2𝜋r
what is the area of a circle?
𝜋r²
if you have endpoints (x1, y1) and (x2, y2) of a line on a coordinate plane, what is the midpoint?
midpoint = ( (x1 + y1)/ 2 , (x2 + y2)/2)
if you have endpoints (x1, y1) and (x2, y2) of a line on a coordinate plane, what is the distance?
√(x2 - x1)² + (y2 - y1)²
how do you find the slope of an algebraic equation?
slope = rise/run
(y2 - y1) / (x2 - x1)