Question
The triangles are similar.
What is the value of x?
Answer:
23
Step-by-step explanation:
you can solve with the Pythagorean theorem
find the value of x - 10
√(12²+5²) =
√(144+25) =
√169 =
13
13 + 10 = 23
or you can solve with a proportion
36 : 39 = 12 : x - 10
x-10 = 39 * 12 : 36
x -10 = 13
x = 23
