1 / 7

1.5 Measurement

1.5 Measurement. AS 91030. Perimeters of Polygons. Learning objectives. I can find the length of missing sides I can find the perimeter of polygons. Perimeters of Polygons. Keywords. A polygon is a shape with straight edges The perimeter is all the way round the outside.

kasimir-sullivan
Download Presentation

1.5 Measurement

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 1.5Measurement AS 91030

  2. Perimeters of Polygons Learning objectives • I can find the length of missing sides • I can find the perimeter of polygons

  3. Perimeters of Polygons Keywords A polygon is a shape with straight edges The perimeter is all the way round the outside

  4. Perimeters of Polygons 5 cm 6 cm Perimeter = 17 + 17 = 34 cm Perimeter = 6 + 4 + 6 + 4 = 10 cm 4 cm 12 cm 6 cm Perimeter = 6 + 5+ 10 + 5 =26 cm 15 cm Perimeter = 15+15+15+15+15 =75 cm 5 cm 5 cm 10 cm

  5. 3 cm Plan A Find the missing sides and add everything up (click and they appear) 7 cm 5 cm Perimeter = 12 + 8 + 3 + 7 + 5 + 5 = 40 cm 12 cm 5 cm 8 cm Plan B Click for cool animation to see the problem a different way  12 cm So now we have a rectangle and the perimeter = 12 + 8 + 12 + 8 = 40 cm 8 cm

  6. Find the total length of black lines. 90 cm side edge 2 x 120 cm lines = 240 cm top edge 2 x 90 cm lines = 180 cm inside there are 2 more 120 cm lines (click to see) and 2 more 90 cm lines which I didn’t animate 120 cm Total length of black lines = 4 x 120 + 4 x 90 = 840 cm

  7. Success Criteria • I can find the length of missing sides • I can find the perimeter of polygons

More Related