Question

What is the value of x?
Enter your answer in the box. X =
28 cm, 42cm, 4 cm
​

Answer 1

x = 6cm

Explanation:

The two triangles are similar because of the stated similar angle and the angles at the intersection are the same because they share the same line. Therefore the last angle must also be the same.

The triangle on the right is 4/28, or 1/7 the scale of the left triangle.

42cm / 7 = 6