The custodian at Lake High School carries a large key ring. He measures it and calculates that it has a circumference of 31.4 centimeters. What is the key ring's radius?

Which of the following statements is not true? a.parallel lines are lines in the same plane that never intersect. b.congruent figures have the same shape and same size angles and sides. c.similar figures must have the same shape and the same size. d.a rotation is when you turn a figure around a certain point.

Brent needs to paint a logo made using two right triangles. the dimensions of the logo are shown below. what is the difference between the area of the large triangle and the area of the small triangle? (1 point) select one: a. 4.5 cm2 b. 8.5 cm2 c. 16.5 cm2 d. 33.0 cm2

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.