Question

Assuming the following two triangles are congruent, solve for x if BC = 2x − 1 and DE = x + 9. D A B O 8 13 10 11 C TE F​

Answer 1

10

Explanation:
Triangle ABC and DEF are congruent triangles.

So,

Side BC = DE

2x - 1 = x + 9

2x - x = 9 + 1

x = 10