Geometry Facts For GRE Flashcards
0
Q
Common Right triangles? (a,b,c)
A
3, 4, 5
5, 12, 13
1, 1, 2^.5
1, 3^.5, 2
1
Q
Pythagorean theorem–calculate lengths of side of a right triangle.
A
a^2 + b^2= c^2
2
Q
Area of a square
A
s^2
3
Q
Area of a rectangle
A
l*w
4
Q
Area of a circle
A
πr^2
5
Q
Area of a triangle
A
1/2(b*h)
6
Q
Area of a parallelogram.
A
b*h
7
Q
Area of a trapezoid
A
1/2((b1+b2)h)
8
Q
Height of equilateral triangle
A
Side length*(Γ3/2)
9
Q
Volume of a cube
A
s^3
10
Q
Volume of a box
A
lwh
11
Q
Volume of a cylinder
A
π(r^2)h
12
Q
General volume formula for 3D objects
A
Volume= (area of base)*(height)
13
Q
Sum of internal angles of a triangle is
A
180 degrees
14
Q
Sum of exterior angles of a triangle
A
360 degrees
