1. Cho góc xOy = 60 độ. Gọi Oz là tia đối của tia Ox. a) Tính góc yOz ?
b) Gọi Om là tia phân giác của góc yOz. Tính góc yOm ?
c) Chứng tỏ Oy là tia phân giác của góc xOm ?

Reflect the point (7,0) across the y-axis

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Aregular pentagon with a perimeter of 21 inches is dilated by a scale factor of 5/3 to create a new pentagon. what is the perimeter of the new pentagon?