Bell work: Turn in when completed If the shapes are similar, list the pairs of congruent angles Determine if the two triangles are similar. Explain.

Determine what side lengths will make two polygons similar Today’s Goal(s) Determine what side lengths will make two polygons similar Utilize Scale Factors to solve problems Prove two triangles are similar

7.2: Similar Polygons (Continued)

If these two polygons are similar, find the values for x and y

Your class is making a rectangular poster for a competition Your class is making a rectangular poster for a competition. The poster’s design is 6 in. high by 10 in. wide. The space allowed for the poster is 4 ft high by 8 ft wide. What are the dimensions of the largest poster that fits in the space?

Using the same poster (6 in high by 10 in wide), what would be the largest possible poster if the dimensions were reduced to 3 ft high by 4 ft wide?

In the picture, the distance between the towers is 6.4 cm.

Seattle’s Space Needle is 605 ft tall Seattle’s Space Needle is 605 ft tall. A classmate wants to make a scale drawing of the space needle on a standard piece of printer paper (8.5 by 11 in.). He wants to use the scale 1 in = 50 ft. Is this scale reasonable? Explain why or why not.

Are these two triangles similar?

Break time

7.3: Proving Triangles Similar

Given: 𝐴𝐵 𝐵𝑃 = 𝐶𝐵 𝑀𝐵 Prove the triangles are similar

Homework: Similarity Worksheet Quiz on Thursday