Which statement is not true? a. all isosceles triangles are also equilateral triangles. b. all equilateral triangles are also isosceles triangles. c. obtuse triangles have one interior angle whose measure is more than 90°. d. acute triangles have no angles whose measures are greater than 90°.

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 : )