Perimeter, Area, Conversion Units Flashcards
length
measure of distance
Kilometer = __ meters
1000 meter
Meter = __ centimeters
100 centimeters
Centimeters = __ millimeters
10 millimeters
arc
A part of the circumference of a circle. It joins any two different points on the circle
chord
a straight line that joins any two points on the circle
circumference
the distance around the outside of a circle (perimeter of a circle)
diameter
a line that crosses a circle, passing through the center
radius (plural = radii)
a line from the center of the circle to any point on the circle
sector
a part of a circle formed by the chord and an arc
tangent
a line that touches the circumference at one point only. It meets the radius at a right angle
segment of a circle
region between a chord and the circle
semi-circle
half of a circle
perimeter
Distance around the outside of a figure
What does “pi” equal
circumference / diameter
3.1415
Formula for circumference (C) of a circle using diameter (d)?
C = “pi” x d
Formula for circumference (C) of a circle using radius (r)?
C =2 “pi” x r
area
measurement of the size of a surface
Area of a rectangle
A = length (l) x width (w)
Area of a triangle
A = 1/2 base (b) x length (l)
Area of a parallelogram
A = base (b) X height (h)
Area of a trapezium
A = average length of parallel sides (a +b) x distance between parallel sides (h)
A = (a+b/2) x h
Area of a kite
A = 1/2 x of the product of the lengths of the diagonals
A = 1/2 (xy)
circle
set of points which are the same distance from a fixed point called a center
