Flashcards in Geometry Deck (12)
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1
Area of a parallelogram
B x H
2
Area of a Triangle
1/2 x BxH
3
Intuition for why 1/2BH is the area of a triangle
A triangle is half as big as the rectangle that surrounds it!
Draw it:
-Split the triangle with a 90 degree vertical line
-Take the triangle portions and rotate 180 degrees.
-Combining with the original triangle makes a perfect rectangle every time!
4
A slanted triangle
Still has an area 1/2 the parallelogram that surrounds it
5
Radius
Half the width of a circle
Any outside point to the center
6
Diameter
The distance across a circle through the center point
7
Ratio of circumference to the diameter
Pi
8
Circumference
Distance around the circle
9
Pi
Circumference / Diameter
10
Circumference Formula
Pi 2r = Pi D
Where D = diameter
Where r = radius
11
Equation of Pi
C/D
Circumference / Diameter
12