Answer:
800 cm²
Explanation:
Given similar figures with ratio of sides = a : b
Then ratio of areas = a² : b²
Here ratio of sides = 20 : 6 = 10 : 3, thus
ratio of areas = 10² : 3² = 100 : 9 = , thus
area of Δ DEF = × 72 = 100 × 8 = 800 cm²
yep your answer was correct
Step-by-step explanation:all you gotta do is divide the area of the smaller one and that is 12 so you multiply 12 by 20 witch is 240
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