Choose ALL the angles with a measure less that 90 degrees.

Look at the image above that posted in the answer to get an idea of what is 90 degrees and lees than 90 degrees.

Now let us find which angles are less than 90 degrees from you answer options. I will choose one and you will find the rest. If you need help then I will give you hints and help you, but try it yourself too. So the answer I choose is the first top left box. That is one of the ans answers. Now it is your turn.

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )