Question

The movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your answer. A flashlight is projecting a triangle onto a wall, as shown below. A The original triangle and its projection are similar. What is the missing length n on the projection? O 35 0224 10 40

Answer 1

We can see that the scale factor from the smaller triangle to the projected triangle is 2.

Multiply each length of the original triangle by the scale factor, to obtain the side lengths of the second triangle:

15 x 2 = 30

15x 2 = 30

20 x 2 = 40

answer : 40