LL: If the two legs of a right triangle are congruent to two legs of another right triangle,
then the right triangles are congruent.
1. Right triangles ABC and DEF, 1. Given
with right angles at C and F.
2. AC = DF. 2. Given.
3. BC = EF. 3. Given.
4. / C = / F. 4. All right angles are equal.
5. Triangle ABC = triangle DEF. 5. SAS