Answer:
40.5 seconds if it is 1:21 minutes
Step-by-step explanation:
60 seconds per minute plus 21 seconds is 81 seconds. Half of 80 is 40, half of 1 is 0.5. Together it is 40.5 seconds for half of 1:21 minutes.
Definitely would have to be a rhombus
Answer:
2a +7
Step-by-step explanation:
Sine and cosine are functions revealing the shape of a right triangle.
Answer:
first answer is angles forming a linear pair sum to 180
second answer definition of perpendicular lines
third answer is substitution
I hope it is correct and helped you