Match the reasons with the statements in the proof to prove DF = EF, given that DEF is a triangle by definition and angles 3 and 4 are equal. Given:

DEF

3 = 4

Prove:

DF = EF

1. 3 = 4
If the Two Angles of a Triangle are Equal, then the Sides Opposite those Angles are also Equal
2. 1 and 3are supplementary

2 and 4are supplementary
Exterior Sides are in Opposite Rays
3. 1 = 2
Given
4. DF = EF
Two Angles Supplementary to Equal Angles are Equal to Each Other

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 : )

its an acute right triangle

step-by-step explanation: