Question

if the sides of a triangle are doubled then find the increase in percentage of it's area

Answer 1

Area of a Triangle = 1/2∗a∗b∗sinθ, where a and b are the length of sides containing the ∠θ

Since sides of the triangle have been doubled

New Area = 1/2∗2a∗2b∗sinθ

Change in Area = (2∗2−1)∗100

Change in Area = (4−1)∗100

Change in Area = 3∗100

Change in Area% = 300% ans  or u can do another process attached