Question

IF LM is congruent to PN and XM is congruent to XN then LX is congruent to PX - how do you prove this?

Answer 1

xm ≡ xn
but x ≡ x -----------> m ≡ n
lm ≡ pn
but m ≡ n==========> l ≡ p
but x ≡ x ========> lx ≡ px

add x in both side of l ≡ p