geometry Flashcards
geomrety
Volume of a Pyramid
1/3 x B x H
Volume of a Prism
B x H
Circle RADIUS
Half of the Diameter
Circle AREA
πr^2 OR π x r x r
Circle CIRCUMFERENCE
π x d OR 2πr
Smallest side + medium side > longest side
One triangle
Any set of 3 angles that add up to 180
Many Triangles
Two side lengths and the third side can vary
Many Triangles
Three angles that do NOT add up to 180
No triangle
Side lengths do not adhere to the inequality theorem
No triangle
Perpendicular lines
Two line segments that INTERSECT to make a 90˚ angle or RIGHT angle
Vertical angles are always…
Equal to each other
Surface area
The area of all faces added up
Angle of 130˚ and 50˚
No triangle
Adjacent angles are..
Two angles that share a common SIDE and VERTEX
Linear pairs
2 adjacent angles with uncommon sides that form a line are linear pairs.
HORIZONTAL cross section is aka
Cross section PARALELL to base
VERTICALLY cut cross section is aka
Cross section PERPENDICULAR to the base
