21 rounded to the nearest 10 is 20 :)
I think the answer is b. cos(pi theta)= -0.6
I think it will be (6v-1) because its the opposite.
In the hundreds place the tend place and the ones place. hopes this helps?!
a) ∠PQR=65° (alternate interior angles theorem)
∠PRQ = 60° (linear pair)
x = 55° (angles in a triangle add to 180°)
b) ∠APQ and ∠PQR are congruent alternate interior angles.
