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# Math-Test 4/25

### Cirles, symmetry, perimeter

DefinitionTerm
All points on a plane equidistant (the same distance) from a point called the center Circle
Segment from the center of a circle to the outer part of the circle Radius
Line segment with both end points on the outer part of the circle Chord
Chord that goes through the center of a circle Diameter
Part of the outer part of a circle Arc
An arc that is less than a half-circle Minor arc
An arc that is more than a half-circle (use 3 letters) Major arc
"I can draw a line through the shape to fold in half and have two equal parts on both sides" Reflection symmetry
"I can turn a shape a # of degrees and a number of times to make it look the same s it was before" Rotational symmetry
"I can turn the shape upside down (180°) and have the shape look the same" Point symmetry
Distance around a geometric figure Perimeter
Perimeter formula for regular polygons P=ns (n=# of sides) (s=length of side)
Perimeter formula for rectangles (2 ways of writing it) P=2l+2w or P=2(l+w)
Perimeter formula for circles (perimeter of a circle=its circumference) P=πd
Created by: km32002