You need a couple more statements. Also, if you
use < for an angle followed by a letter (not a number) you
must skip a space after < , otherwise the program will think
it's an HTML tag and will delete what follows it. It's best
to use the symbol ∠ for an angle which is gotten by
typing this code:
.
Given : m∠1 = m∠3 and m∠2 = m∠4
Prove : m∠ABC = m∠DEF
Statements Reasons
1 m∠1 = m∠3 Given
2 m∠2 = m∠4 Given
3 m∠1 + m∠2 = m∠3 + m∠2 Equals (in step 1) added to equals
(in step 2) gives equals.
4 m∠1 + m∠2 = m∠3 + m∠4 equals (in step 2) may be substituted
for each other (in step 3)
5 m∠1 + m∠2 = m∠ABC a whole is equal to the sum of its parts
6 m∠3 + m∠4 = m∠DEF a whole is equal to the sum of its parts
7 m∠ABC = m∠DEF equals (in steps 5 and 6) may be substituted
for each other (in step 4).
Edwin
