1 Circles and Loci.notebook

1

October 29, 2015

Feb 14­08:16

L.O.• draw circles and arcs with a given radius• find and draw a locus of points around a point• find and draw a locus of points around a line• use locus of points to find regions satisfying prescribed conditions

Circles and Loci Date

Feb 14­08:22

Key Words for this Lesson

CircumferenceArcRadiusDiameterChordSegmentSector

Feb 14­08:21

circles and arcs with a given radius (G)Main 1:

radius4cm

Draw a circle with a radius ofa) 4cmb) 5cm

c) 6 squares of your book

Draw a circle with a diameter of 14cm.

Feb 14­14:01

locus of points around a point (D)Main 2:

This is Woof the dog.He wears a lead that is 2m long when

he is left out in the middle of the garden.

Feb 14­14:08

locus of points around a point (D)Main 1:

Feb 14­14:01

locus of points around a point (D)Main 2:

This is Woof's brother, Bark.Poor Bark has a lead of length only 1m

long!

1 Circles and Loci.notebook

2

October 29, 2015

Oct 23­09:57 Feb 14­14:08

locus of points around a point (D)Main 1:

Feb 14­14:08

locus of points around a point (D)Main 1:

Shade the region where Woof and Barks could meet.

Oct 22­17:47

locus of points around a point (D)Main 1:

Feb 14­17:05

If 1cm on the map is 100m in real life then how many cm on the map is:

a) 100m b) 200mc) 550m

locus of points around a point (D)Main 1:

Feb 14­17:05

locus of points around a point (D)Main 1:

If 1cm on the map is 100m in real life the how many m in real life is:

a) 3cmb) 12cmc) 5cm

1 Circles and Loci.notebook

3

October 29, 2015

Oct 22­17:47

locus of points around a point (D)Main 1:A Eastern Delight“We will deliver for free anywhere in a 2km radius.”

Oct 22­17:47

locus of points around a point (D)Main 1:B Subway“Subway will not deliver anywhere for free but for a fee we will deliver anywhere in a 200m radius.”

Oct 22­17:47

locus of points around a point (D)Main 1:

Feb 14­17:04

Lucy lives on Barerstr. She wants to order some food to be delivered to her house.

a) Lucy‛s first choice of delivery food is Chilli Hot. Will they deliver to her house?

b) Lucy‛s second choice of delivery food is KFC. Will they deliver to her house?

locus of points around a point (D)Main 1: