8.1
Exercises
Help with
Bigideos
Vocabulary and Concept Check
1. VOCABULARY What is the relationship between the radius and the diameter
of a circle?
2. WHICH ONE DOESN'T BELONG? Which phrase does not belong with the other
three? Explain your reasoning
the distance around a circle times twice the radius
Umes the diameter
the distance from the center to any point on the circle
Practice and Problem Solving
Find the radius of the button.
28 mm
15 cm
YOUR
VOTE
COUNTS
Find the diameter of the object.
0.8
for.
Find the circumference of the pizza. Use 3.14
39.
17 in
10 in
18 in
CuOSE TOOLS Choose a real-life circular object Explain why you might need to

Arecent article in newsweek stated that 25 percent of students entering collage read below the 10th grade level. is this statement an fact or an opinion?

read this excerpt from president john f. kennedy’s inaugural address on january 20, 1961: in the long history of the world, only a few generations have been granted the role of defending freedom in its hour of maximum danger. i do not shrink from this responsibility—i welcome it. i do not believe that any of us would exchange places with any other people or any other generation. the energy, the faith, the devotion which we bring to this endeavor will light our country and all who serve it—and the glow from that fire can truly light the world. and so, my fellow americans: ask not what your country can do for you—ask what you can do for your country. my fellow citizens of the world: ask not what america will do for you, but what together we can do for the freedom of man. based on the excerpt, what is the central idea of this speech? a. to cultivate a sense of well-being among the american people b. to motivate people everywhere to uphold the freedom of humankind c. to motivate americans to strive for the development of their nation d. to foster a feeling of happiness and unity across people and nations

Why does yu tsun kill dr. albert at the end of borges’s “the garden of forking paths”?