Answer:
see explanation
Explanation:
(1)
Δ MNK ≅ Δ RTP
to find the congruent triangle to MNK , express the vertices in the same order, that is
M is at the right angle then start with R in the other triangle , followed by
N at the end of the leg and K the third vertex
the same order in the other triangle is R → T → P
then
Δ MNK ≅ Δ RTP
(2)
NM is congruent to TR
TR are the first 2 letters in Δ TRP
the congruent side will be the first 2 letters of Δ NMK , that is NM
then
NM is congruent to TR
(3)
corresponding sides in the 2 triangles are congruent , that is
TR = NM , that is
3x - 1 = 20 ( add 1 to both sides )
3x = 21 ( divide both sides by 3 )
x = 7