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Perimeter and Area of Similar FiguresGeometry Unit 4, Lesson 4
Perimeters of Similar Figures
Areas of Similar Figures
What we discovered: If the similarity ratio of two similar figures is a:b, then The ratio of their perimeters is a:b The ratio of their areas is a2:b2
Example 1 3 in 5 in The area of the smaller regular hexagon is 30 in2. Find the area of the larger hexagon. What is the ratio of the corresponding sides? What is the ratio of the areas?
Example 1 3 in 5 in The area of the smaller regular hexagon is 30 in2. Find the area of the larger hexagon.
Example: The similarity ratio of 2 triangles is 3:2. The area of the larger triangle is 36cm2. Find the area of the smaller triangle. What is the ratio of the areas? Set up the proportion:
Example: The areas of two similar triangles are 50cm2 and 98cm2. What is the ratio of their perimeters? Simplify the ratio then Work Backwards!
Example 50 98 REDUCE! 25 49 Find the square root 5 7
Example: The areas of two similar rectangles are 2940 ft2 and 135 ft2. Find the ratios to their perimeters. Ratio = 14/3
8.6 Perimeters and Areas of Similar Figures (1 card)
Surface Area and Volume of Similar Figures
You will use the ratio of two similar figures to find their perimeter and area.
10-4 Perimeters and Areas of Similar Figures
Section 8-6 Perimeter and Area of Similar Figures SPI 22d: determine the perimeter & area given the ratio of 2 similar polygons.
11.3 Perimeter and Area of Similar Figures. Two rectangles are similar. One has width 4 in. and length 6 in. The other has width of 6 in. and length of.
Example 1: Effects of Changing One Dimension
11.3 Warm Up Warm Up Lesson Quiz Lesson Quiz Lesson Presentation Lesson Presentation Perimeter and Area of Similar Figures.
Essential UnderstandingEssential Understanding You can use ratios to compare the perimeters and areas of similar figures Students will be able to.
No warmup Grab a note sheet off of table and have out your challenge packets.
Chapter 10: Area Section 10-4: Perimeters and Areas of Similar Figures.
8.6:Perimeters and Areas of Similar Figures
Find the Perimeter and Area:
FeatureLesson Geometry Lesson Main 1.For the similar rectangles, give the ratios (smaller to larger) of the perimeters and of the areas. 2.The triangles.
Geometry: Changing Dimensions
Warm-up: MSA Review Day 6. Geometry Unit 7 Objective: Students will find the area of Composite Figures (Compound Figures)
Section 11-3 Perimeters and Areas of Similar Figures.
Similar Figures Examples and Step by Step Directions.
Geometry Chapter 11 Review. Solve for x Each exterior angle of a regular n-gon measures 40°. What is the value of n?
Special Ratios Similar Figures: Scale Factor Ratio of Perimeters
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