Question

Help with trig please.

Two Δ are similar. The sides of the first Δ are 5, 10, and 15. The largest side of the second Δ is 20. Find the perimeter of the second Δ.

Answer 1

40 units

Explanation:

Perimeter of the first triangle:

5+10+15 = 30

ratio of perimeters = ratio of sides

ratio of perimeters = 20:15 = 4:3

Perimeter of the second one: P

P/30 = 4/3

P = 40