Question

The triangles are similar.
What is the value of x?
Enter your answer in the box.

Answer 1

Explanation:

16

using proportion

12 : 3 = x : 4

x = 12 * 4 : 3

x = 48 : 3

x = 16

using Pythagorean theorem

√(20²-12²) =

√(400 - 144) =

√256 =

16