Pi and Circle Relationships
What is the definition of pi?
The scale used on a blue print is 1/4 (.25) inches represents 2 feet. What is the blue print if the actual length is 20 feet?
10 inches
A similar shape is...
Radius
Half way across the circles center
Johnny made a model scale of the Sam Houston Monument. The actual monument has an actual height of 604 feet. Johnny's model used a scale of 1 inch equals 100 feet. What is the height of the model?
6.04 feet
Similar shapes can be...
Different sizes, rotated differently, etc
All the way AROUND the circle is called the
Circumference
A small rectangle has a length of 12 inches and a width of 16 inches. The big triangle had a length of 30 inches. What is the width of the big triangle?
40 inches
Corresponding sides that are congruent
______ is all the way ACROSS the center of a circle
Diameter
Shala had to draw a map of a river for geography class. Her maps scale was 4cm represented 20km. The actual length of the river was 82km, what is the scales length in cm?
16.4cm
Similar shapes do not always have...
Corresponding sides that are congruent
What is the definition of pi?
Pi describes the relationship between the circumference to the diameter of a circle. And it is shown C/D
Find the missing side
15(on top) / 12(on bottom) = x(on top) / 18(on bottom)
x=22.5cm
To find similar shapes sides that are the same I MUST...
Write the letters of each shape out, and see what sides are the same by drawing and connecting lines