Geometry - Unit 7

Day / Topic, Standard / Std / Teaching / Homework
8 (C) / Similarity, scale factor, solving similar triangles / 5 / CW Day 8 Agenda / S 11,17,26,27,28,29,30,36
9 / Overlapping similar triangles, applications, AA postulate / 5 / CW Day 9 Agenda / S 7,16,31,35,39,40,48,50,52
10 / Ratios for area and volume, SAS and SSS similarity / 11 / CW Day 10 Agenda / S 59,60,61,65,98
11 / Ratio applications / 11 / CW Day 11 Agenda / S 69,71,74,82,83,99
12 / Review / Practice Test / Complete Practice Test 7 & Notes (1 pg.)
13 / Test 7 / Test

Additional Practice

Day 8

Assume that figures shown are similar and find x and y

1. 2. 3.

4. 5. 6.

Day 9 (Assume parallel lines)

1. 2. 3

4. 5. 6.

Determine if each pair of triangles is similar. If yes, give a reason why.

7. 8. 9. 10.

Day 10

1.  If the ratio of areas is 1:49, find the ratio of perimeters.

2.  If the ratio of areas is 9:25, find the ratio of volumes.

3.  If the ratio of sides is 4:9, find the areas of volumes.

4.  If the ratio of volumes is 125:8, find the ratio of perimeters.

5.  If the ratio of volumes is 64:27, find the ratio of areas.

6.  If the ratio of areas is 75:3, find the ratio of heights.

7.  If the ratio of volumes is 24:3, find the scale factor.

8.  If the ratio of diameters is 6:5, find the ratio of volumes.

9.  If the ratio of areas is 100:81, find the ratio of heights.

10.  If the ratio of sides is 9:4, find the ratio of areas.

Determine if each pair of triangles is similar. If yes, give a reason why.

11. 12. 13. 14.

Day 11

1.  The areas of two similar trapezoids are 36 and 81 square inches. If the height of the larger trapezoid is 6 inches, find the height of the smaller.

2.  The heights of two similar prisms are 10 and 40 feet. If the volume of the smaller prism is 75 cubic feet, find the volume of the larger.

3.  The volumes of two similar pyramids are 54 and 128 cubic centimeters. If the base area of the smaller pyramid is 20 square centimeters, find the base area of the larger.

4.  The perimeters of two similar rectangles are 27 and 36 inches. If the area of the larger rectangle is 16 square inches, find the area of the smaller.

5.  The surface area of two similar cylinders are 16 and 25 square meters. If the volume of the smaller is 10 cubic meters, find the volume of the larger.

Blaske 2008-2009