Basics Flashcards
Convert 3/8 to a decimal
.375
Convert 5/8 to a decimal
.625
Convert 7/8 to a decimal
.875
Convert 1/6 to decimal
.16
Convert 5/6 to a decimal
.83
Convert 1/9 to decimal
.11
Convert .125 to fraction
1/8
Convert .375 to fraction
3/8
Convert .625 to fraction
5/8
Convert .875 to fraction
7/8
Convert .16 to fraction
1/6
Convert .83 to fraction
5/6
Convert .11 to fraction
1/9
Formula for circumference (diameter)
Pi*diameter
Formula for circumference (radius)
2 pi r
Area of a circle
Pi r squared
What is a central angle?
Degrees between two radii
In a triangle is the sum of any 2 sides greater than the 3rd side?
Yes
What is the sum of all angles in a triangle?
180
What side of the triangle is longest?
Side in front of the largest angle
Describe an isosceles triangle
A triangle with 2 equal sides and angles
Describe an equilateral triangle
All sides are equal and all angles are 60
What is the perimeter of a triangle
Sum of all sides
Area of a triangle
1/2 base * height
What is the definition of right triangle?
One of the angles is 90
What is Pythagorean theorem?
A^2+b^2=c^2
What are the common triplets for triangles?
3-4-5 5-12-13 8-15-17 6-8-10 10-24-26
What do adjacent angles in a parallelogram sum to
180
Opposite sides and angles in a parallelogram are?
Equal
Area of a parralelogram
Area= base height
What is the fastest way to compare 2 fractions to see which is bigger?
Cross multiply. Bigger one is larger.
Can you split a sum in the denominator?
No!
Basic formula for a line
Y=mx*b
M= slope B= y-intercept (x=0)
What are the answer choices for data sufficiency?
12TEN
A = 1 = statement 1 only B = 2 = statement 2 only c= T = together (both statements) D = E = either statement E = N = neither
Convert 1/8 to a decimal
.125
Square root of 2
About 1.4
Square root of 3
About 1.7
1/12
.083
1/11
.090909
14 squared
196
13 squared
169
15 squared
225
25 squared
625
(X+y)(x-y)
X^2-y^2
