Interior angles of a triangle add up to 180
< X + < Y + < Z = 180
68 + Y + 90 = 180
158 + Y = 180
Y = 180 - 158
Y = 22 <==
You have to know how long it takes them both to solve the puzzles. ;)
Answer:
Each kids weight in a chart
Step-by-step explanation:
I chose this because its the most organized way of doing that
(3^2)^-2
9
9^-2 = 1/9^2 ---> 1/81
should be 1/81